Step 1: Open the Navatar Outlook Plugin. Click on the three lines icon (top right) and then on Log Out
Step 2: It will now ask you to login into your Salesforce Account.
Step 3: Once you click on Salesforce account, a browser window will open. Now, enter your Navatar credentials.
Step 4: Next, click Allow to grant Navatar outlook plugin the access to log in.
Step 5: Come back to outlook and Click Connect to Office 365. A browser window with Office 365 login page will be opened.
Step 6: Enter your Office 365 login credentials in the dialog box
Step 7: Just click on next and accept the permission and then you will be re- registered in Navatar outlook plugin.