You could try clearing the cache. Go to settings, Apps, look for the app that handles Outlook, go to Storage and you should see clear cache. You will lose all your local settings but probably not emails in Outlook itself assuming there is a web based version but there is the risk. I recently had this problem with gmail, did this and then restarted and on restart rhe emails reloaded and incoming emails worked again. If you don't have Outlook on another device I wouldn't even take the risk. You could also use backup, Settings, search for Backups and Restore, I prefer the Google option. If you have an SD card you can do a second backup there. Also check for hacking in case your emails are being diverted.
Thanks all. It was due to an update that somehow provided onedrive access to my photos. It caused my outlook to exceed storage limits. I have deleted the files, disabled onedrive and will probably consider changing my email account. Thanks for help.
