exhange 2010 DAG

what is the difference between reseeding and updating database in DAG 2010 EXCHANGE SERVER

In what situation we perform?
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IvanSystem EngineerCommented:

Update and Reseed are the same thing. You do it in standard situations like DB corruption, when copy status is in failed, after offline defragmentation or such things.

pramod1Author Commented:
Which command should I run on EMS on mail box server to check which AD server it is talking to

get-AD server ?
timgreen7077Exchange EngineerCommented:
Ivan is correct, update and reseed are the same thing. you can run various commands for different occasions though. See below links for good articles on both occasions.

If you have a failed content index I would seed on the index:

If you have a failed or unhealthy Database Copy in a DAG you would then seed the DB copy:

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IvanSystem EngineerCommented:

I think that Exchange communicate with all DC, except if you did not configure StaticDomainController.

To check what is configured use command: Get-ExchangeServer | fl
Look at parameter CurrentDomainControler, StaticDomainController and OriginatingServer

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