In the context of a Exchange 2007 to 2010 migration, we need to accomplish two operations:
- Transfer the OAB generation process to an Exchange 2010 server.
- Designate the Client Access Servers (CAS) that will distribute the OAB (and select the mechanism used: Public Folder and/or web-based distribution).
Transfer the OAB generation role to Exchange 2010
Upon completion, a message will display indicating that we can delete the OAB files on the now former OAB generation server:
In the EMS, this cmdlet would produce the same effect:
Move-OfflineAddressBook -id "\Default Offline Address Book" -Server EX13-1
Add the Exchange 2010 server(s) as an OAB distribution point
Once again, this can be accomplished with the EMC or EMS.
First, the EMC. We open the properties of the "Default Offline Address Book"
We click on Add...
And select the OAB Virtual Directories that we want to use.
Here is the EMS equivalent:
Set-OfflineAddressBook -AddressLists '\Default Global Address List' -VirtualDirectories 'ex1\OAB (Default Web Site)','EX13-1\OAB (Default Web Site)','EX13-2\OAB (Default Web Site)' -Identity '\Default Offline Address Book'
Note: we have to indicate all the virtual directories. If we indicate only...
"EX13-1\OAB (Default Web Site)"
Exchange will replace existing virtual directories with that one and that one alone.