After a seemingly successful migration from SBS2003 to SBS2011 and disabling the SBS2003 shares, most of the clients are experiencing severe slowness in general system use.
From what I've been able to gather from the users, the slowness occurs when using any of the following: Windows Explorer, Acrobat Reader, QuickBooks, WordPerfect, Outlook, Browsers (Chrome/Firefox/IE). This occurs even if an applications is running with no other applications running.
I haven't tried applications other than what's listed, but suspect they will have similar results. Nothing is logged at the client side as far as I can find.
If I enable the shares on the old server, the clients are able to function normally again.
The migration process was based on Demazter's SBS2003 to SBS2011 guide
All drive and printer mappings have been removed from the clients, but the clients appear to still have some persistent connections to the old server.
Any ideas on what may be causing this?