Lagged Database Copy - help.

Hi exchange gurus!
I am working on testing LAgged DB copy in Exchange 2013. What I've done:
1. Configured lagged passive copy by running set-mailboxdatabasecopy .... -replaylagtime 2 (similar to what we have on transport), I didn't use -truncate option (is that important? Or default value is fine?)
Then during the next 2 days I've sent some email messages to the mailbox that is hosted by the active DB copy.
Then on third day I have deleted all the messages from the mailbox.
I followed this article (http://technet.microsoft.com/en-us/library/dd979786(v=exchg.150).aspx), and used the (Use the Shell to activate a lagged mailbox database copy to
a specific point in time) passive lagged copy, replayed the logs (step by step like in the article), then resumed the passive lagged copy and activated it. I have then waited until all statuses say healthy and made sure that lagged DB copy was mounted.
I have checked the user mailbox and none of the messages from the previous 2 days were there.
I know I am doing something wrong but I don't know what since this is my first experience with lagged copies. From this article (http://social.technet.microsoft.com/wiki/contents/articles/17881.lagged-mailbox-database-copy-exchange-2013-enhancements.aspx)
it sounds like when I do what I did above the mailbox was supposed to be populated with email messages from 2 pevious days but this didn't happen.
Please advise.

Even though the copy is lagged the logs still get copied to the machine right away, the logs just aren't replayed right away. And if you try to move to the lagged copy, it will try to reach out to the last active copy and copy what logs it didn't get. So
to test the loss you have to make sure that the logs don't get copied over to the lagged machine.
Yes, Active Manager can choose to active a lagged copy. Active Manager doesn't even know if a copy is lagged or not. All it will do is look at the state of each copy and determine which one is the best one. So if your Preference 1 copy just went bad, AM
will look and if it sees that Preference 2 (not lagged) happens to have a replay queue of 200 logs (due to a case of bad luck) and your Preference 3 (lagged) happens to have a replay queue of 199 (because of the lag) AM will pick the Preference 3 copy to be
the next active copy.
ActivationOnly the Active Manager will not automatically chose that copy during a failover. If you set the
DatabaseCopyAutoActivationPolicy property on the MailboxServer to blocked then the AM will never pick any of the copies on the server to become active as part of a failover.

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ActivationPreference : {[HQMB02, 1], [HQMB01, 2]}
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Servers              : {SSMB01, SSMB02, HQMB01, HQMB02}
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TruncationLagTimes   : {[SSMB01, 00:00:00], [SSMB02, 00:00:00], [HQMB01, 00:00:00], [HQMB02, 00:00:00]}
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Hi Exchange Guru,
thanks so much for the prompt response..i have few queries to ask following your guidelines above:
1. from the show result above, I am still confuse which server that I should go to remove as this is involving 4 database copies. from what I understand from the truncation or replay lag times of SSDB01 and SSDB02, I can see that HQMB01 and HQMB02 are on
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Hi,
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If the issue persists, please check the application log to see if there is any related error message.
Best regards,
If you have feedback for TechNet Subscriber Support, contact
[email protected]
Belinda Ma
TechNet Community Support

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