Posting here in case anyone has noticed a similar issue or might know of a solution. I set up a few agents in Copilot Studio last week with references to knowledge stored in Sharepoint sites. The agents were shared with a few users, all of which have visitor access to the site where the knowledge is stored. I have a test user with the same permissions. There are no issues accessing the site, folder, and reading the documents as the users.
Everything was working just fine until Friday afternoon. Users could ask the agents questions in Teams, Copilot and it would serve up the relevant content from the SP knowledge base. When testing in Copilot Studio, same thing. All working perfectly.
All of a sudden on Friday afternoon, the agents could no longer find relevant content in the Sharepoint site. Started to see the agent return messages like "I apologize, but I couldn't find specific Mac setup instructions in our knowledge base." and then go to a fallback response. I would see the same in Copilot studio when testing. I can see it searching for relevant content, but no matches.
If I upload the knowledge directly into the Agent (not from Sharepoint), it works just fine.
I see no connection warnings, credential issues, and nothing has changed in our tenant settings since we deployed the agents and saw success last week. I've removed and re-added the SP knowledge multiple times. Created new agents from scratch and all have the same issue. If I add a Confluence knowledge source, it works without issue. This is specific to Sharepoint knowledge.
Is anyone else experiencing this issue all of a sudden? Any suggestions on what I can check next?
