In attempting to upgrade our Exchange 2010 server to SP3, everything goes fine until the mailbox role, at which point I get this error:
Setting the permission on the archive mailbox failed for 'DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852}'. Run the command again after resolving the issue. Exception: The database 'Archive_DB' to be accessed on server 'hydrogen.xxx.org' is not mounted or is not available.
Both the archive and mailbox databases show that they're mounted.
http://terenceluk.blogspot.in/2013/10/upgrading-exchange-server-2010-to.html
http://social.technet.microsoft.com/Forums/exchange/en-US/ab5e39d1-3386-4446-9a7f-35b5b6b2a6dc/exchange-mailbox-role-installation-error-?forum=exchange2010
Mahesh