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Event ID 21054 error logged on Lync Server 2013

I’ve recently been asked several times to look at why a Lync Server 2013 server’s LS Address Book Server consistently logs the event ID 21054 error whenever the address book is updated with Update-CsAddressBook cmdlet or after the maintenacne that is ran every day: The

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Deploying Lync Server 2013 Monitoring and Archiving

As many may know, Lync Server 2013 no longer requires separate servers for the Monitoring and Archiving role as they are now collocated directly on the front-end server.  This is definitely a welcome changed as it reduces the amount of servers required for a Lync

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