Re-authorizing an expired or revoked token for Xero Practice Manager
This requires removal of the existing connection in Xero Practice Manager. Please follow the easy steps below:
  - Login to Xero Practice Manager link
 
  - Select Business Tab > Connections > Connection Management > Third Party Connections > OnePracticeSync
 
  - Click Disconnect on the OnePracticeSync Connection
 
You are now ready to re-authorisation OnePracticeSync at
  - Visit this link  link and login with an administrator level 365 account
 
  - Select the correct Document Center from the list of sites
 
  - Click Connect XPM
 
  - Choose the XPM instance to connect to and click Allow Access
 
  - Choose the correct XPM tenant if you have multiple
 
  - Click Create Sync Schedule
 
  - The system will perform a number of tests to make sure the accounts you have used are able to connect succssfully to Office 365 SharePoint and to XPM