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Update your offline address book

To update your offline address book.

Temporary fix during change moratorium

Use the following steps

Navigate to

C:\Users\\AppData\Local\Microsoft\Outlook -- (username is firstname.surname)

In there is a folder called offline address books

Close outlook first and rename this folder to old-Offline Address books.

then re-open outlook


if the folder will not rename then you have something associated with outlook still open - like an attachment.


if you cannot see a folder called ‘appdata’ then.

click on organize on top left.

click on folder and search options

click on view

Select the item to show hidden files, folders and drives, located just below the heading 'hidden files and folders.