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Simon-0135 asked JeffYang-MSFT edited

Persisting Settings across Outlook updates

I have written and Outlook 365 Add-in in C# and have been using the Settings [Properties.Settings.Default.Save] method to persist those user settings across sessions.

However, every time the Outlook application is updated, a new version of the settings file is created from the original default, rather than copying the previous settings file.

The settings files live here. C:\Users*[User]*\AppData\Local\Microsoft_Corporation[Add-in]
Browsing this directory shows a folder for each Outlook version since the add-in was created.

How can these settings be persisted across the Outlook updates?

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Hi @Simon-0135,

Welcome to our forum.

I read your issue above carefully, it seems that the Add-in you developed via C# cannot be saved after Office update, right? I tried some research but could not found much more information about issues like this. Considering the Outlook tag here we mainly focus on general issues about Outlook desktop client and know little about developer issue, I added some developer-related tags here to better help solve your issue.

The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thanks for your understanding and hope your issue could be resolved soon.

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