Outlook has many command line options. Several of them do various forms of cleanup, and this can help Outlook performance a lot. To do them all (as of Outlook 2013 and 2016):
- Create
C:\CLEANOUTLOOK.CMDcontaining the below:
"outlook.exe" ^ /cleanconvongoingactions ^ /cleandmrecords ^ /cleanips ^ /cleanmailtipcache ^ /cleanreminders ^ /cleanroamedprefs ^ /cleansniff
- Find a working Outlook shortcut, do a Shift-Rightclick on it, and choose “Open file location”
- Copy that path (e.g.,
C:\Program Files\Microsoft Office\root\Office16), paste it into a non-administrative CMD after CD, to get the CMD into that folder - Enter
C:\CLEANOUTLOOK.CMD
Done!