By default, Outlook 2016 - 2019 sets the Offline Global Address List as your main address book. This can cause issues when sharing calendars with other people in your department, or when granting delegate access to your email account. The instructions below will assist you in changing the default Address Book in Outlook 2016 - 2019 to the Online Global Address List and prevent the aforementioned issues.
These instructions will only work for Outlook 2016 - 2019 on PC.
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