Sep 11 2018 04:38 AM
Sep 11 2018 04:38 AM
One of our customers uses Microsoft Teams as their chat-based workspace. They can create teams, add channels, discuss in conversations and share files with each other, all within Microsoft Teams. Recently, they decided to start working with other companies using Microsoft Teams. However, after sharing a team, the guest user has only access to the team channels, switch between the tabs, and participate in conversations. The guest user cannot open files shared in a chat, he receives the error message "You don't have access to this file.". When the guest user switches to the Files tab, he cannot see any document, only the error message "You don't have access to these files". Opening the SharePoint site as the guest user results in the error message "You need permission to access this item". The SharePoint settings seem to support external sharing. Attach files provide screenshots from the guest user's Team environment, and the Teams / SharePoint sharing settings.
We were able to reproduce this error for new teams, for each invited guest. Steps to reproduce:
Any ideas on how to make collaboration with guest users working?
Sep 11 2018 05:00 AM
Sep 12 2018 01:59 AMSolution
We managed to get this working by changing the Office 365 Groups sharing settings. Below you can find the Office 365 Groups settings resulting in the issue and the changed settings which resolved the issue.
Jan 28 2019 10:28 AM
Jan 28 2019 10:31 AM
Jun 24 2020 03:11 AM
@Harold van de Kamp Hey Harold (and anyone following) - I've been following the guest user scenarios for years now and have occasionally contributed with answers and blog posts.
Today, I published a blog post rounding up the most frequent questions I get asked and the most Googled queries. You can find it here.
Disclaimer: I am affiliated with Mio who offers a solution to one of the problems in this post.
Jul 02 2020 08:35 AM - edited Jul 02 2020 08:37 AM
@Harold van de Kamp I know this is an old thread, but still very relevant as organisations expand their understanding of Teams and external / guest users. If anyone is experiencing this kind of issue (or any other sharing issues), there's a number of places to check:
Hope this helps.
Feb 10 2021 02:03 PM
@Oz Oscroft I have tried this and still guest users are not able to access files.
Feb 16 2021 11:40 PM
is there actually a conclusion for this topic?
For me, all settings are set. But still our guests can not see the files tab.
Thanks for a short feedback - if there is no, I would create a microsoft ticket and ask them directly.
Mar 19 2021 09:57 AM
@keptenkrems This is what I finally did. I did not see this documented anywhere so I make no promises other than it allowed me to give guests access to Team files... Goto SharePoint admin, Sites, Active sites, click the Team, Policies, 'Edit' External sharing, choose either 'Anyone' or 'Existing guests only' depending on what you want. Save
Aug 18 2021 11:02 PM
@Joe76 I was able to get the Guests access to shared content by modifying the site permissions on SharePoint Online. Check this https://docs.microsoft.com/en-us/microsoft-365/solutions/collaborate-as-team?view=o365-worldwide