I looked up an issue we are having and Microsoft says that I have to do the following:
Option 1: Manually Update/Add the mailbox credentials to Credential Manager & rebuild the Autodiscover.xml file
Navigate to Control Panel > Credential Manager > Windows Credentials > Remove/delete any records with the users mailbox address.
Download the SaveCredentials.exe tool.
Run the SaveCredentials.exe file as administrator.
Enter the mailbox username and password when you get the password prompt.
Next navigate to %LocalAppData% > Microsoft > Outlook.
Locate the file that ends in Autodiscover.xml.
Note: File may look something like this: f0a4256167a8597a89das6hf01c6bb1b - Autodiscover.xml
Delete or rename this file.
Restart Outlook.

I cannot find where this is at all --> %LocalAppData% > Microsoft > Outlook

Can someone please tell me where this is?
Thank you