Provider Hosted Add-Ins fails on SharePoint Online

Solution

All Gimmal Solutions

Product

All Gimmal Products

Product Version

All Versions (PH)

Issue

Currently All Provider Hosted Add-Ins on SharePoint O365 tenant with remote web as IIS website on OnPremise environment starts failing after a year with following error:

 "Invalid issuer or signature".

Root Cause

​Client Secrets for all the Add-Ins expires after a year.

Resolution

​Follow the steps below:

1. Remove expired client secret for each Add-Ins in your tenant.

2. Add new client secret values by re-registering the app.

3. Update the client secret values in web.config file of remote web.

Follow the article below to get detailed resolution steps for this issue.

http://blogs.technet.com/b/sharepointdevelopersupport/archive/2015/03/11/provider-hosted-app-fails-on-spo.aspx

 

 

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