If you experience functionality problems accessing a website you have previously been able to access (like O365 shared areas) this maybe due to corruption within your browsers cache
This can be cleared by following the steps below - if the first option does not work try the second or third options below:
Within IE click on the 'gear' icon in the top right corner then 'Safety' then 'Delete browsing history...'
Then ensure the following tick boxes are ticked and then click on 'Delete'
Now close ALL IE sessions you have open and try again
Option 2 : If the problem still persists please try resting IE - as follows:
Make sure all sessions/open windows or IE are closed and confirm in task manager that there are no iexplorer.exe processes running
Then start IE and click on the 'gear icon' in the top right hand corner then select 'Internet options'
Then on the 'Advanced' tab click on the 'Reset...' button
Then make sure the 'Delete personnel settings' box is ticked then click on the 'Reset' button
Now close IE and log off user
Log back into the computer and try to access the O365 shared area again
If neither of the above fix the problem, the following folder 'Protect' needs to be deleted from the users security profile
Get the user to log off the computer, then delete the 'Protect' folder in the location of the profile as shown below:
Then get the user to log back in again and check that each Office application is automatically logged into the O365 shared areas
If the problem still persists, please contact the helpdesk