Help calculating mailbox size

Hi,
What is the best way to calculate the maximum mailbox size I can give to my users?
I know how to set their quotas but I don't know what I can set it to. Is there a "maximum total of all mailboxes" size that is specified that I can divide by the number of users I have?
Vince

What is the best way to calculate the maximum mailbox size I can give to my users?
The design guide referrs you to the supported platforms list for this. The tables (e.g. Table 1) have a row labeled Approximate message storage, G-711 codec, minutes which gives you the total amount of minutes worth of storage. You can reference Table 3-1 Comparison of Audio Codecs Used for Recording from the design guide to convert between minutes and actual megabytes of storage consumed.
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Similar Messages

Mailbox sizes increase dramatically after migration to exchange 2013

After I migrate mailboxes from exchange 2010 mailbox to 2013, the size increases.
For example -
On exchange 2010 I run get-mailboxstatistics: TotalItemSize : 6.706 GB
On exchange 2013: TotalItemSize : 9.374 GB
Anand_N

Hi Anand,
Please note that the actual space used by the mailbox database will not increase. This only refers to the attribution of space used by each individual mailbox. Actually, this happens due to the inclusion of all item properties into quota calculations, providing
a more accurate computation of space consumed by items within their mailbox. However, you can adjust mailbox size and increase mailbox quota by 40% before moving.
You can follow below cmdlet in order to increase "ProhibitSendQuota" value for all users that are not using the database quota defaults:
Get-Mailbox -ResultSize Unlimited -Filter {UseDatabaseQuotaDefaults -eq $False} |
Where {$_.ProhibitSendQuota -ne "unlimited"} | ForEach {Set-Mailbox $_ -ProhibitSendQuota "$($($_.ProhibitSendQuota).Value.ToMB() * 1.4)MB" -WhatIf}
You can have a look on this link to prevent the cause :
Mailbox migration from 2010 to 2013
Hope, this will be helpful for you.

Mailbox size increased after removing attachments

Doing a little clean-up on my mail, I noticed my sent mailbox was 1.23 gigs. So, I went in saved several hundred attachments and then tried to remove attachments. It would only let me remove attachments about 5 messages at a time, so I moved over 300 messages that all had attachments to a new folder. After moving them I was able to remove all the attachments at one time.
But after moving and removing attachments the size of my sent mailbox did not decrease it actually increased by over 400 megs to 1.7 gigs. And the new folder was also very large, at almost 700 megs (even after removing attachments).
Any ideas how/why this happens? and what can I do to reduce the size of that mailbox?
I have had the overflow issue before and have been trying to keep and eye on the mailbox sizes and keep them under 1 gig, but this one got by me. My only complaint is mail does not tell you the size of a mailbox in the application, if I was able to check the mailbox size right from the app it would be an easier thing to keep an eye on an everyday basis.
Any help would be great.. thanks!
G4 400 Mac OS X (10.3.9)

For each mailbox, Mail 1.x stores messages sequentially in an mbox file within the *.mbox package associated with the mailbox -- you can see the files contained in an *.mbox package by ctrl-cliking on it in the Finder and choosing Show Package Contents from the contextual menu.
When a message is removed from a mailbox in Mail 1.x, the actual message may be completely erased from the mbox file, or it may remain there just marked for deletion in one of the other supporting files within the *.mbox package. In order to reduce the mailbox size when a message is deleted from the middle, the entire mailbox would have to be rewritten to disk every time, which is clearly not practical.
When attachments are removed from a message, the attachments aren’t actually removed from anywhere. What really happens is that Mail creates a new message without the attachments and deletes the original message... and now you know what it really is that actually happens when a message buried in the middle of the mailbox is deleted...
My only complaint is mail does not tell you the size of a
mailbox in the application
Mail 1.3 sure does. The size of the selected mailbox is displayed in the status bar (View > Show Status Bar). Interestingly enough, that feature is no longer available in Mail 2.x.

Cyrus max mailbox size? (Not quota)

Hi,
Hopefully a quick question... I searched on the forums and web but to no avail, everything talked about quota.
I just wanted to know if there is a suggested limit for individual mailbox sizes in Cyrus (Theoretical or definitive)? What about the overall database size, any suggested or definitive limits there?
This is not a space concern (Mail servers raid6 has a good 1TB left). I mainly just want to know if there is a point where performance begins to suffer and / or if chance of database / mailbox corruption increases at a certain level. This is on a 10.5.6 xServe 8 core 4GB RAM connected to a promise raid6.
Naturally a reconstruct takes longer on a larger mbox and so on of course. Thanks in advance for any answers!

Hey Alex,
Quick followup if I may. For clarification sake. Do you mean per "user" or per "mailbox". IE: I have a user with 1.3GB in "inbox" for example but say they also have 700MB in a mailbox they created on the same IMAP account called "archive" and then another called "personal" at 300MB. Have I eclipsed the the best practice 2GB at this point or is it a per folder basis?
For example when I review these in cyrus admin they are of course separate but when viewing the user backup records as a whole through mailbfr, it combines all folders per user account as expected. Just wondering which value to go off.
Thanks for your continued help!

List of exchange users with mailbox size per database.

Hello Friends,
Need small help i need to take out the list of users start with Alphabet A, B , C till Z per database along with their mailbox size limit so is there any simple way to get the list.
Thanks
Amit

Hi,
How about this?
http://help.outlook.com/en-us/140/gg576861.aspx
EDIT: Or maybe this:
$out = @()
$users = Get-Mailbox -ResultSize Unlimited
ForEach ($user in $users) {
$userMailboxStatistics = Get-MailboxStatistics $user
$props = @{
Username = $user.SamAccountName
DisplayName = $user.DisplayName
Database = $user.Database
OrganizationalUnit = $user.OrganizationalUnit
'Quota Status' = $userMailboxStatistics.StorageLimitStatus
TotalItemSize = $userMailboxStatistics.TotalItemSize
$out += New-Object PsObject -Property $props
$out | Sort-Object Database,DisplayName | Export-Csv .\mbxDetails.csv -NoTypeInformation
Adjust the $props hash as needed to add/remove properties to the output object.
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(Don't give up yet - 12,420+ strong and growing)

Listing Mailbox Size Limits

I am looking for an easy way to check individual mailbox limits without manually clicking my way through 3000 users.
I have looked up the Admin API for running a simple vbscript but the mailbox limits field isn't listed in the API reference. Surely someone has had to do this before?
thanks!

Oppss!! Sorry for the confusion.
You can have a listing of the Mailbox Size Limit for each user doing a maintenance of the post office.
Try this.
1.-Do a GroupWise Mailbox/Library Maintenance
Select Action: Analyze/Fix Database
Select: Structure
Select: Contents
Select: Collect Statistics
Databases. Users (Selecet Message if you want)
Results: Send the results to you email.
2.- Wait by the end of the process
3.- Open the log file and search for "Disk space management values"
You can observe the following values for each user:
.- Size Limit - (n)KB
.- Threshold - (n)%
.- (n)kbytes in use by user's mail
I hope this help to you needs.

Calculating the size of the database in memory

Hi,
I am using BDB 5.1.19 with BTREE as an access method.
I would like to calculate the memory footprint that would be needed for that.
I followed the following doc:
useful-bytes-per-page = (page-size - page-overhead) * page-fill-factor
bytes-of-data = n-records *
(bytes-per-entry + page-overhead-for-two-entries)
n-pages-of-data = bytes-of-data / useful-bytes-per-page
total-bytes-on-disk = n-pages-of-data * page-size
I am not interested in calculating the size on disk but just in memory.
Would the following be enough:
bytes-of-data = n-records *(bytes-per-entry + page-overhead-for-two-entries)
Since the rest is only for space on disk i don't need it, is that correct?
Would this calculation help me also to calculate the cache size or is the cache size influenced by the page size?
Thx.

This is not a replication question and those of us monitoring this forum are not the best people to answer this question. You'll probably get a better and faster answer if you post it to the general Berkeley DB forum:
Berkeley DB
Paula Bingham
Oracle

Exchange 2013 - change user mailbox size to over 2GB

Estimates
They know how to set the mailbox size of a user to over 2GB in Exchange Server 2013
the console does not display alternatives, Please urgent thank you
saludos

Hi
Here you go
Set-Mailbox -Identity "Ayla Kol" -IssueWarningQuota 900mb -ProhibitSendQuota 950mb -ProhibitSendReceiveQuota 1gb -UseDatabaseQuotaDefaults $false
http://technet.microsoft.com/en-us/library/aa998353(v=exchg.150).aspx
Please mark as helpful if you find my contribution useful or as an answer if it does answer your question.That will encourage me - and others - to take time out to help you.
Regards,
Sathish

Can't log onto Mozilla; Mailbox " Size Exceeded"

I've had to create an account to my husband's address to log this request. I've been in internet limbo today, unable to log in. I requested and received response re my user name, but have received no response re Re-setting password.
I got notices re exceeding my mail limit, which is inaccurate. this happened a couple months ago, I deleted all saved mail, incl on server at that time. today it's happening again. I got a flashed message, numerous times, when I tried to receive or send mail. One of these messages: "UID max mailbox size exceeded". there was a second one re size, which I couldn't catch before it vanished. Now I've received no email all day. I also got this piece of mail earlier, before I could no longer receive anything. the return address is System Administrator. "The size limit of 100 MB for mailbox '[email protected]' has been exceeded. Incoming mail is currently being rejected." This also happened in the instance I referred to a few months ago, when I contacted my provider and got rid of everything on the server. I assume this is some sort of phishing? I did not click the live link via my address as stated in the quote above. This is the reason I ran Dr. Web Light and reset computer.
I've looked on forums, find nothing that answers my problem. I cleaned whole computer w/ Dr Web Light, over many hours. 3 items were alerted, then lquarantined. I unplugged Mac to reset, left 5-10 minutes, restarted. No change. As I began typing this, after I registered an account w/ husband's name/email, my TB logo in dock now reads 416 items of new mail, tho inbox still shows only 3. A second account, same name and email, presumably created when I was having trouble upgrading TB last year, from a very old version, reads 413 items of mail, but in the inbox, as if just received, are a lot, but probably less than 100, some dated from 2013, some from today.
Prior to this, this morning, I was unable to delete items to trash, getting another message, repeatedly, and deleted items re-appearing.
It is very disconcerting to find myself so cut off and blocked, I couldn't even send you an email w/o a forum registration, and until I created a new acct, this left me totally stranded. Yikes! Please help. I'll check my husband's mail tomorrow. maveet [email protected]

Login to your account via webmail. Check your quota and delete messages if needed.

Exchange 2010 SP3 maximum journal mailbox size for performance

Hello all,
Does anyone know if there is a limit mailbox
size near 01 terabyte than
above it generates performance problems?
We have a journaling mailbox that
reached today 1.077 GB and
from there began the process very
slowly messages to store.
All (4) Exchange Hub Trasnport that try to connect to this store get an 4.32 store drive error. A new
journal mailbox was created in the same
database, and the problem was solved.
Thanks
João Paulo.
Exchange 2010 SP3 RU8 on-premisses

Hi Paulo,
Base on my knowledge, journaling mailbox as the same as any other mailbox, the maximum size depends on the data to be stored in the mailbox, the hardware resources available, and the disaster recovery requirements
for the server where the journaling mailbox is located.
If you configure journaling mailboxes without storage quotas, monitor the Mailbox server to ensure that it doesn't exceed the available hardware resources or disaster recovery capabilities.
Best regards,
Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected]
Niko Cheng
TechNet Community Support

Exchange 2007 servers reports mailbox size full, but mailbox shows empty in OWA or Outlook.

When the users log into their mailboxes in OWA or Outlook get this warning: "You have exceeded your limit quota and can not send or receive mail" but really they have the mailbox empty, there's nothing in calendar, folders or deleted items.
I ran this command Get-MailboxStatistics and the mailbox reports for example 500 MB.
I deleted the deleted items and I configured deleted items retention to 0 days to ensure that it wasn't the problem, but the servers still reporting the same mailbox size (500 MB).
This happen to some mailboxes, not all
Please help, what can I do?

1. How many Exchange 2007 servers do you have?
2. What service pack and rollups are installed on the Exchange 2007 server(s)?
3. If you have more than one server, are you using any form of replication: LCR, SCR, CCR... etc. ?
4. What 3rd party software is installed on the Exchange 2007 server(s)? For example, antivirus, archiving, etc.
5. Can you confirm that this happens in OWA as well? I see you mentioned OWA but I've just glanced at another problem with incorrect folder size being indicated in Outlook and it apparently had to do with the .OST file. Of course, if the problem occurs with
OWA as well, then the OST file would not come into play. Sorry to insist on that but I'm trying to rule some things out, if possible (like 3rd party apps, maybe something with replication, maybe a problem that was corrected in a service pack or rollup).
Please mark as helpful if you find my contribution useful or as an answer if it does answer your question. That will encourage me - and others - to take time out to help you.

Public Folder To Mailbox Map Generator maximum mailbox size

Hello,
I am in the planning stages of a 2010 to 2013 public folder migration.
Upon running the following script to generate the mailbox mappings in 2013 I receive the following error regarding the maximum mailbox size requested.
[PS] C:\Program Files\Microsoft\Exchange Server\V15\scripts>.\PublicFolderToMailboxMapGenerator.ps1 5120MB E:\Migration\
PublicFolders\PFMapNameToSize.csv E:\Migration\PublicFolders\PFMapFolderToMailbox.csv
[25/11/2014 11:32:08] Reading public folder list...
[25/11/2014 11:32:08] Loading folder hierarchy...
[25/11/2014 11:32:08] The size of the folder @{FolderName=\IPM_SUBTREE\Company\Admin Team\Info; FolderSize=174
62349238} (17462349238) is greater than the mailbox size 5368709120
[25/11/2014 11:32:08] Unable to load public folders...
I want to set the maximum mailbox size to 5GB, however it seems that this is not possible given that some of the existing folders exceed the maximum mailbox size specified.
I have increased the mailbox size gradually until there are no errors reported, but this leaves me with a maximum mailbox size of 50GB which is not what I require.
There is circa 45 GB of data in the PF hierarcy currently, with the largest folder containing around 42 GB of data.
I thought the idea was that the mapping generator would split the public folder data up and distribute it across multiple mailboxes as required?
Can anyone assist with achieving this please?
Regards
Matt

Hi Belinda,
Thanks for the reply. I've done some more investigating, as I thought the public folders sizes being reported were larger than expected.
Upon running the Get-PublicFolderStatistics cmdlet across the public folder hierarchy I can indeed see that the largest public folder we have is only 4.46GB in size, not the 42GB being reported by the generator.
PublicFolderToMailboxMapGenerator
[PS] C:\Program Files\Microsoft\Exchange Server\V15\scripts>.\PublicFolderToMailboxMapGenerator.ps1 25600MB E:\Migration
\PublicFolders\PFMapNameToSize.csv E:\Migration\PublicFolders\PFMapFolderToMailbox.csv
[25/11/2014 11:40:10] Reading public folder list...
[25/11/2014 11:40:10] Loading folder hierarchy...
[25/11/2014 11:40:10] The size of the folder @{FolderName=\IPM_SUBTREE\Company\Dept\SubDept Inbox\Offers; FolderSize=45160928457} (45160928457) is greater than the mailbox size 26843545600
[25/11/2014 11:40:10] Unable to load public folders...
Get-PublicFolderStatistics
Name ItemCount TotalItemSize LastUserAccessTime LastAccessTime FolderPath Offers 4314 4.46 GB (4,788,856,098 bytes) 25/11/2014 11:41 26/11/2014 08:14 Company\Dept\SubDept Inbox\Offers
Going back a step - before running the PublicFolderToMailboxMapGenerator.ps1
, the issue is initially occurs when running the Export-PublicFolderStatistics.ps1 as this is where the folder sizes are calculated and output to the PFMapNameToSize.csv. This is where the folder size is inflated by 10 times!
Is this a bug?
Does anyone know how to change this behaviour?
Regards
Matt

User mailbox size

Hi,
Im using XCH 07 with single mailbox database, total users around 50 users. i have one user with large mailbox size, and different between mailbox and outlook. at mailbox, it's 15gb meanwhile at outlook is only 4gb, change between cached and online mode not
help. this cause i got warning on exchange server with online maintenance termination with default maintenance schedule (1am-5am) and database size also increasing as that user mailbox size increasing. test with custom longer maintenance scehdule also not
help, still got termination due to overlapping (xch backup exclude when use custom scheudle). appreciate is anyone ever got this problem may share the solution. thanks
manggar77

Hi,
To get the size of a mailbox, we can use the Get-MailboxStatistics cmdlet to obtain information. In Exchange 2007, the ESM no longer exists. Where do you see the different mailbox size (15gb)? Do you mean EMC?
In EMC, Recipient Configuration->Mailbox, right click on the user mailbox and choose
Properties, under General tab, you can see the
Size.
Best regards,
Belinda
Belinda Ma
TechNet Community Support

Getting total mailbox size for specific OU member only

Hi,
In Exchange Server 2007 and I wonder if by using Powershell, I can get the mailbox size for each of the member of specific OU and display the total at the bottom for that OU members ?
Thanks in advance.
/* Server Support Specialist */

Wrong command not working
How so?
Start your own thread and put some actual effort into it if you want help.
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Need Mailbox Sizes and Target addresses from 2003 mailboxes

I'm am about to decom our old 2003 exchange server, but I need to gather some information prior to decom. I need to get the mailbox sizes of all users and the "TargetAddress" for each user (Blank or populated)
I have a script to gather all of the mailbox sizes, but am trying to incorporate the target address as a column into the results.
On Error Resume Next
Const wbemFlagReturnImmediately = &h10
Const wbemFlagForwardOnly = &h20
CONST FileName ="D:\scripts\Exch2003Stats.csv"
arrComputers = Array("Server1","Server2")
q = """"
Set objFSO = CREATEOBJECT("Scripting.FileSystemObject")
Set objCSV = objFSO.createtextfile(FileName)
objcsv.writeline ("DisplayName,LegacyDN,Server,Database,TotalItems,Size(MB)")
For Each strComputer In arrComputers
Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\MicrosoftExchangeV2")
Set colItems = objWMIService.ExecQuery("SELECT * FROM Exchange_Mailbox", "WQL", wbemFlagReturnImmediately + wbemFlagForwardOnly)
For Each objItem In colItems
SizeinMB = Round(objItem.Size / 1024, 2)
objcsv.writeline (q & objItem.MailboxDisplayName & q & "," & q & objItem.LegacyDN & q & "," & q & objItem.ServerName & q & "," & q & objItem.StoreName & q & "," & q & objItem.TotalItems & q & "," & q & SizeinMB & q)
Next
Next
objCSV.Close
Set objFSO = nothing
Set objWMIService = nothing
Set colItems = nothing
'Create link to CDOmail
Set objMsg = CreateObject("CDO.Message")
'Enter subject of message in quotes
objMsg.Subject = "Automated Message: Exchange 2003 Data Report for " & Date()
'Enter email address of sender within quotes ie
objMsg.From = "[email protected]"
'Enter destination email address in quotes.
objMsg.To = "[email protected]"
'Set the message body
objMsg.TextBody = "Automated query executed from the 'Exch2003Stats_RunThis' scheduled task on zexowat02.zachry.com."
'Add the attachment
objMsg.AddAttachment "D:\scripts\Exch2003Stats.csv"
'Setup the server to send the email through
objMsg.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2
objMsg.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpserver") = "Servername.domain.com"
objMsg.Configuration.Fields.Item ("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = 25
objMsg.Configuration.Fields.Update
'Send the message
'objMsg.Send
WScript.Quit
Bobby Pendino

Hi Bobby,
Sorry for my lack knowledge about script and code. According to your description, I understand that you are using a script to get all mailboxes size and target address information from Exchange 2003. For more professional suggestions, I recommend you can
also ask a question in Script Center for more help:
http://social.technet.microsoft.com/Forums/scriptcenter/en-US/home?forum=ITCG
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us.
Sorry for any inconvenience and thanks for your understanding.
Regards,
Winnie Liang
TechNet Community Support

Help calculating mailbox size

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