Die outlook.exe Prozess takes a lot of memory and once reached a value of around 500MB there is a permanent switch, within seconds,
from 400 to 600 and ....
Moreover the CPU Load is permanently around 100%.
As a side effect the process is crashing often.
There is also a freeze of user interaction after the process was running for a while.

After the crash there is a message that the information storage (*.ost) File is unavailable.

When is compress the file it is fine, there may be some locks on the file.

I would warmly appreciate to get help.