Thanks John, I'll get the lastest CU installed.

The error is comingup when I try to create AG with AG wizard. It was trying to add secondary replica and is failing....

The Job and SQL agent gets hung in a few seconds(<10 sec).

Weird thing is, when I run sp_addsubscription manually in SSMS, it is successful.  The issue is only when I...

Database size is 650gb. I've tried using snapshot method, creating the snapshot was very slow.

profiler trace is resource consuming.On busy servers, running profiler with GUI causes more issues than actual performance issue(in my experience:-)).

server side trace is lightweight

I found this article helpful comparing profiler...

thankyou..Yes, there's blocking and I understand we cannot have two full backups at sametime..Can you give me an explanation on why it cant be done or provide any BOL article...

thanks..Path is correct..But when I removed 'I$', it seems to be working..

Service account has Local admin privileges on the server..Do you know why it was showing access denied when I$...