Domain A is old domain.  Domain B is new Domain.

Step1:check sidhistory sid.
1. On a domain controller in Domain B, run ldp.exe, click the Connection menu, click Connect, type the domainB DC name and port 389, click OK to connect to the server.

2.Click the Connection menu again and click bind, input the user name, password and domainB domain name, click OK to bind to it.

3. Click the View menu, click Tree, select the corresponding domain partition in the dropdown menun and click OK.

4.After that, in the left pane, expand the domain and locate the corresponding migrated user, double click the user and check the user properties in the right pane. Please find the sidhistory attribute to find the migrated sid.

Blackberry have new release and provisioning notes that document BES 5.0 SP3 with Lync support. Check it out release notes here and provision notes here. Software release should follow soon.

“Support for additional instant messaging servers

The BlackBerry Enterprise Server is designed to support the following instant messaging servers:

• Microsoft® Office Communications Server 2007 R2
• Microsoft® Lync™ Server 2010”

You may want to change the maximum message size for high priority emails, as the default value is 250KB. The “MaxHighPriorityMessageSize” parameter controls the maximum allowed size for a high priority message.

Navigate to the Bin directory and find EdgeTransport.Exe.Config file. Open it using notepad and find the line that says MaxHighPriorityMessageSize:

Microsoft just released an update to the E2010 Mailbox Server Role Requirements Calculator that addresses several usability issues identified in the v12.8 release. To see what's new in this version and to download it, please go to Updates to the Exchange 2010 Mailbox Server Role Requirements Calculator!

More details about the calculator (updated for this new version) inExchange 2010 Mailbox Server Role Requirements Calculator.