Exchange 2010 - IISReset

I need to perform an iisreset on an Exchange 2010 server that is part of a DAG and running the CAS, HUB and Mailbox roles.  Will there be any failover of the databases, impact to Oulook, etc when running the iisreset?
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Scott CSenior EngineerCommented:
Doing an iisreset would only affect people who are accessing OWA or Public Folders, but since the reset takes place so fast, your users would probably not notice a thing.

I usually do an iisreset /noforce which means:

"Do not forcefully terminate Internet services if attempting to stop them gracefully fails."
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Valentina PerezExchange ServersCommented:
Hi Ben-Sohn,

When you perform iisreset...it will restart all IIS..so normally when i perform it you see a small disconnection in Outlook but it last only a moment...it is almost invisible in the client side. It will affect OWA, ActiveSync,..

But you will not experience failover in the DAG, it do not affect databases.

Regards
Valentina
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Scott CSenior EngineerCommented:
@Valentina...good point. Thanks for adding that.
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AmitIT ArchitectCommented:
User connects via CAS role in Exchange 2010. You haven't provided the details about your environment setup, like CAS are on separate server or multi-role. It is always good to do any change in your exchange servers, after off business hours. If it is part of HLB, you can remove it from the HLB and then do the maintenance work.
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