Is cutover migration reliable if i have 2055 GB data to move?

I need to move my existing exchange 2010 sp1 environment to cloud, I've less then 2000 mailboxes and around 2055 GB data to sync
Is Cutover Migration recommended approach or should i proceed with Hybrid Approach??

Hello,
It depends on your environment and requirements. You can use Microsoft Advisory Service below:
https://support.microsoft.com/en-us/gp/advisoryservice?wa=wsignin1.0
Thanks,
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact
[email protected]
Simon Wu
TechNet Community Support

Similar Messages

Dirsync after Cutover Migration

Hi All,
I am trying to setup dirsync following a cutover migration.
There is lots of unclear and out of date information about in the forums regarding this.
So far we have done the cutover migration - sucked the email into 365 and repointed all the clients to 365.
I successfully uninstalled Exchange 2010 onsite.
Everything is working OK.
We now want to use dirsync to sync the 365 passwords with the local AD.
I have installed the latest version of the ad sync tool and configured it.
I have locked down the sync to 1 OU to test to make sure I dont break any of the other users if there is a problem.
I have a test user in the OU which I am attempting to sync (this user was created / migrated using the cutover migration process).
I get the following error "Unable to update this object because the following attributes associated with this object have values that may already be associated with another object in your local directory services: [ProxyAddresses <with the
email address of the object I am trying to sync>"
There was discussion of a process for doing this with Exchange 2007 that required a script to update the AD users prior to syncing - is this still required with Exchange 2010 ?
If there is a document that covers something I have to do prior to this process or should it just work ?
Thanks.
M.

OK for everyone else I found the issue I was facing. I had previously deployed dirsync prior to the cutover migration (we were going to do things a different way). We then had to disable dirsync and delete all the users prior to changing to a cutover migration
- this left duplicates in the deleted users in 365.
I had to follow this http://365command.com/justins-tech-tip-of-the-week-purging-and-removing-deleted-users-and-mailboxes-from-office-365/ to permanently delete the users in the 'recycle bin'.
This then resolved my issue with dirsync.
Hope this helps someone else.
M.

Cutover Migration to Exchange 2013 On-premises

I have two clients who will be merging their on-prem Exchange
organizations. Different forests. I've done many cutover migrations to
Office 365 for other clients so I'm familiar with the process. My
question is: Is it possible to do an O365-style cutover migration (create migration endpoint, cutover batch, etc.) from
an on-prem Exchange 2010 server to an on-prem Exchange 2013 server using
the same steps?
Thanks in advance for any input.
Steve

Hi,
Based on my knowledge, the Cutover Migration is used for migration to Exchange online. There is no related document about
Cutover Migration from Exchange 2010 to Exchange 2013.
To perform Exchange 2010 corss-forest migration to Exchange 2013, you need to use Active Directory Migration Tool (ADMT) migrate user accounts.
Here is a related blog which may help you. (Even though this article is for Exchange 2010 corss-forest migration, it's also applies to cross-forest migration from Exchange 2010 to Exchange 2013.)
http://blogs.technet.com/b/meamcs/archive/2011/06/10/exchange-2010-cross-forest-migration-step-by-step-guide-part-i.aspx
Best regards,
If you have feedback for TechNet Subscriber Support, contact
[email protected]
Belinda Ma
TechNet Community Support

Majority of mailboxes fail to migrate to Exchange Online, Cutover Migration from Exchange 2010

Hi, hoping someone with Office 365 migration skills might be able to help with this one:
I have about 90 mailboxes in a Cutover migration batch process which only 4 mailbox succeed.
The rest fail with error:
MapiExceptionLogonFailed: Unable to make connection to the server. ‎(hr=0x80040111, ec=1010)‎
I've done a bunch of searches on this error and it looks to be a permissions issue. But comparing the successful mailboxes to the rest, I can't see where the issue lies.
The endpoint uses the domain\Administrator account which has Full Access to all the mailboxes and I have run the powershell command to grant Receive As to the mailbox database.
Any ideas?
The full error is:
Error: MigrationPermanentException:
Error: MapiExceptionLogonFailed: Unable to make connection to the server. ‎(hr=0x80040111, ec=1010)‎ Diagnostic context: Lid: 49064 dwParam: 0x3 Lid: 49191 EMSMDBMT.EcDoConnectEx called [length=153] Lid: 65063 EMSMDBMT.EcDoConnectEx exception [rpc_status=0x6B5][latency=1562]
Lid: 45169 StoreEc: 0x824 Lid: 50544 ClientVersion: 15.0.921.12 Lid: 52080 StoreEc: 0x824 Lid: 44273 Lid: 49064 dwParam: 0x3 Lid: 59431 EMSMDB.EcDoConnectEx called [length=153] Lid: 34855 EMSMDB.EcDoConnectEx returned [ec=0x3F2][length=56][latency=1703] Lid:
56945 Lid: 59431 EMSMDB.EcDoConnectEx called [length=153] Lid: 34855 EMSMDB.EcDoConnectEx returned [ec=0x3F2][length=56][latency=156] Lid: 59505 StoreEc: 0x3F2 Lid: 50544 ClientVersion: 15.0.921.12 Lid: 51056 ServerVersion: 14.2.247.4001 Lid: 52080 StoreEc:
0x3F2 Lid: 51152 Lid: 52465 StoreEc: 0x3F2 Lid: 60065 Lid: 33777 StoreEc: 0x3F2 Lid: 59805 Lid: 52487 StoreEc: 0x3F2 Lid: 19778 Lid: 27970 StoreEc: 0x3F2 Lid: 17730 Lid: 25922 StoreEc: 0x3F2

Update:
I managed to fix this by creating a new admin account in Active Directory, assigning it the Receive As permission to the datastore
"Add-ADPermission -Identity "Mailbox Database 0383061665" -User "iif.admin" -ExtendedRights Receive-As"
Then restarted the Mailbox Assistant service (which could have also fixed it I guess, not sure).
Edited the endpoint in O365 to use the new account then reran batch process.
All accounts now appear to be syncing properly.
Hope this helps someone.

Cutover Migration from EX2010 to O365

Starting this weekend, we are going to be performing a cutover migration from Exchange 2010 to Office 365. To give an idea of the size of the current email system, we have around 90-100 users and a total of 400GB of data and approx. 2,000,000 items. Average
mailbox has 19,000 items at 4GB. The cutover migration will be done using an Outlook Anywhere endpoint. The internet connection from where the migration will take place is 20mbps download and 4mbps upload.
We were never expecting the migration to be quick, given the amount of data, but after some simulations and calculations we have found that, best case scenario, the initial synchronization phase will take 7 days.
Our major concern is use of upload bandwidth during the initial sync and how it will bog everything down from a user's perspective, not just regarding browsing performance but mainly because on the same internet connection as the Exchange they have a site to
site VPN with another branch. We were therefore thinking of using the migration batch's start and stop functions to control the migration to happen only during out-of-office hours. Naturally the migration will take much longer to complete overall but the top
management prefer this than having 7 days of nearly unusable network performance.
This raises three questions:
Is the start/stop approach to the initial synchronization phase a good idea?
This is a problem I'm sure most companies face when migrating to Office 365. What approach do companies normally take to reduce the effects on the production environment?
What would be the best approach in such a situation, more simultaneous mailbox transfers (e.g. 10 mailboxes) to speed up the sync but bogging down the network, or less simultaneous mailbox transfers (e.g. 1 or 2) which might slow down overall migration but
hopefully free up some upload bandwidth?

As per your description, I would suggest you to start from here :
https://support.office.com/en-us/article/What-you-need-to-know-about-a-cutover-email-migration-to-Office-365-961978ef-f434-472d-a811-1801733869da
This covers almost all the required aspects while need to do cutover migration from Exchange 2010 to Office 365.
You should note that a maximum of 2,000 mailboxes can be migrated to Office 365 by using a cutover Exchange migration.
You may give a short span of time to this another informative reference :
https://support.office.com/en-nz/article/Perform-a-cutover-migration-of-email-to-Office-365-9496e93c-1e59-41a8-9bb3-6e8df0cd81b4
Also, Exchange server deployment assistant is your friend that is available from Microsoft team and provides step-wise assistance when performing cutover migration.
As an alternative, if you wish to accomplish this task automatically, you may also consider on this automated solution (http://www.exchangemigrationtool.com/)that could be a good approach for you to get
this job done without any downtime(that's the main concern of most of administrators).

Cutover Migration Issue

Hi ,
I have an issue with Cutover migration to office365.
Exchange environment:
3 Exchange 2003 Servers
3 Exchange 2010 Servers.
AD domain : abc.com
Exchnage organization: abc.com
We have acquired two other companies, so we have added additional email addresses to mailboxes created in our Exchange with below domain names.
Test1.com and Test2.com ( I am not publishing the domain names here).
We connect to our mailbox using abc.com credentials, however primary SMTP address of the user alters between test1.com and test2.com.
Now:
i have added necessary permissions on mailbox databases for migration user.
Tested the RPC Over HTTP and it is working fine.
Started the the migration batch and it provisioned all the user mailboxes, distribution groups , contacts etc.
But the problem is it is not moving any data from onpremise to cloud.
Failing with error :
AutoDiscoverFailedConfigurationErrorException: AutoDiscover failed with a configuration error: The migration service failed to detect the migration endpoint using the Autodiscover service. Please enter the migration endpoint settings
or go back to the first step and retry using the Autodiscover service. Consider using the Exchange Remote Connectivity Analyzer
I confirm that auto-discovery is working fine, but still the items are not moving.
Regards, Prakash Nimmala Skype : Prakash.Nimmala Email ID : [email protected] Whenever you see a helpful reply, click on Vote As Helpful & click on Mark As Answer if a post answers your question.

Yes.. We used Exchange Remote Connectivity analyzer to Test Auto-discover.
This issue is now solved, with the help of Microsoft.
Regards, Prakash Nimmala Skype : Prakash.Nimmala Email ID : [email protected] Whenever you see a helpful reply, click on Vote As Helpful & click on Mark As Answer if a post answers your question.

Exchange Cutover Migration Mailbox limit

Greetings,
In the Microsoft documentation says:
You can migrate a maximum of 2,000 mailboxes from your on-premises Exchange organization to Exchange Online using a cutover migration. This migration method only moves mailboxes,
mail users, mail contacts, and mail-enabled groups.
But in the EAC migration console when I select cutover migration it says the limit is 1000 mailboxes
I need to validate if the limit is 2000 mailboxes or 1000, and also if I can migrate more than 1000 mailboxers without issues even when EAC says the maximum is 1000.
Thanks in advance for the help!

Hi AC,
As the documents said, the limit now is 2,000 mailboxes.
I notice following information in the article
http://community.office365.com/en-us/w/solutions/4294.aspx :
In Remote move migrations, you have to implement a hybrid deployment to migrate more than 1,000 Exchange 2010 or Exchange 2013 mailboxes to Exchange Online.
Please verify whether you are in the Remote move migrations.
Also suggest asking Office 365 forum for help so that we can get more professional suggestions. For your convenience:
http://community.office365.com/en-us/default.aspx
Thanks
Mavis
Mavis Huang
TechNet Community Support

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If your PC already is connected to the Internet, hold down the Windows button on
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WiltonA_VZW
VZW Support
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Additional tip at https://discussions.apple.com/message/24176756#24176756
Select the iTunes Store on the left side of iTunes if you have the sidebar displayed, or with the button at the top right.
Click on Purchased on the right side under Quick Links.
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editing those js files! I TOLD you you could do it!
Mark, it's EERIE that you should say this to me today because this is exactly what I have been thinking! I can put a song on a page with one eye shut now, and I can zip around those files pretty well (except for the recent fiasco where I didn't even look at the right folder). I also notice that the level of my writing is sounding more technical and familiar with digital world jargon. I remember how you told me I could do it, and you were right. You all were right and I feel more knowledgeable and at a point where I suspect that I can take steps on my own. HTML is a strange land, but just being able to edit that .js file and FIND it by navigating for it in Text Edit has made me feel much more competent.
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Is cutover migration reliable if i have 2055 GB data to move?

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