Ahsay OBM version 6.9.x.x

Your receive the message: “logonSession ERROR= MAPI_E_NOT_ENOUGH_MEMORY Detail= Not enough storage is available to complete this operation” when you try to start Ahsay Maillevel backup.

Solution:

Look for the proccess “MAPISP32.EXE” in the task manager and kill it, then run my Cleanup Ahsay script found Here, and you are good to go.