Guest access now available in Project for the Web!

Is there a current implementation guide for this?

Specifically, from a CSP perspective if possible.

Is there a way to give a unlicensed guest user access to view the gantt chart timeline?

Microsoft Project Team wrote:

3. Can I keep track of guest assignments without giving them access to the project? 

Yes, you can use the “Just assign” option after assigning a task to a guest to simply keep track of the task assignment without sharing sensitive information with the guest. 

I have this exact need. I don't need to share the project itself with the guest; I just have to be able to assign tasks to the guest for my own internal records. In other words, I need to assign the task to someone or an organization represented by a label, not an actual email address.

This would work if I could only find a way to reach the "Just assign" option.

Here's what I see when I click on "Assigned To":

Here's what I get when I enter text:

Why is it so difficult to do this? Do I need to pester my already-overworked Office 365 administrator to give me additional privileges even though I'm not adding any actual persons nor giving any outsiders access to my data? I can't imagine that this is something no one has ever thought of; it makes the entire resource management process unusable.

Oh, and BTW -- At least one of your clearly visible message formatting options results in an "invalid HTML" error, and now I'm trying to figure out which one it is.

Great article.

Is there a way to give internal users or guests access to their assigned tasks, but don't let them see the whole project?

To fix the acess problem for guests with Project license, the guests must logon https://project.microsoft.com/“correct_owner_domain_name", like https://project.microsoft.com/exampledomain.com,  then it should be fixed.

Checked the group settings and they seem to be okay

I used the network console of the browser.

There I see that the guest account gets an 403 access denied for the following:

https://project.microsoft.com/api/v1.0/TenantSetting/GroupSettings

 

The next call thereafter just shows basic entitlements:

https://project.microsoft.com/api/v1.0/Me/FeatureEntitlements

{"value":[{"feature":"modernProject","accessType":"readOnly","licenseLevel":"basic","settings":{"criticalPath":false,"canOnlyEditAssigned":true,"differentDependencies":false,"canEdit":false},"category":"commercial"},{"feature":"roadmap","accessType":"readOnly","accessStatus":"none","category":"commercial"}]}<div>The group call in the home tenant works and the entitlements call returns the following<li-code lang="json">{"value":[{"feature":"projectOnline","accessType":"readWrite","category":"commercial"},{"feature":"roadmap","accessType":"readWrite","category":"commercial"},{"feature":"modernProject","accessType":"readWrite","licenseLevel":"professional","settings":{"criticalPath":true,"canOnlyEditAssigned":false,"differentDependencies":true,"canEdit":false},"category":"commercial"}]}<div>Checked the group setting and its not the culprit.<br /><a href="https://support.microsoft.com/en-gb/office/let-guests-see-your-project-in-project-for-the-web-81e1c210-74b2-4711-98ab-dea58f1b566b" target="_self">https://support.microsoft.com/en-gb/office/let-guests-see-your-project-in-project-for-the-web-81e1c210-74b2-4711-98ab-dea58f1b566b <blockquote><div><div><span><strong>Important: <span>Each item marked "Yes" in the table above will only work if a group administrator turns on the access setting <span><strong>Let guest group members access group content. <br /><span>To turn this off, go to <a title="https://admin.microsoft.com/" href="https://admin.microsoft.com/" target="_blank" rel="noreferrer noopener">admin.microsoft.com<span> > <span><strong>Org Settings<span> > <span><strong>Microsoft 365 Groups<span>.<div><div><li-image width="400" height="400" alt="TrutzStephani_1-1652111752711.png" align="inline" id="370224i1AB4CD99CA79E389" size="medium" resized="false" sourcetype="new"><p> </p></li-image></div></div></span></strong></span></span></strong></span></span></a></span></strong></span></span></strong></span></div></div></blockquote></a></div>

I'm testing a dummy guest account and it seems the issue was the "Restricted Guest Access" on Azure AD

It seems the guest needs to be able to view group membership. I'm still going to test limited access as I've only tested "same as member users" so far and it has worked after 4-6 hours waiting for propagation.

Similar experience here. We have attempted to invite guest users (that already have a Project license via their home organisation), but their existing Project license isn't recognised. We have reluctantly purchased new Project licenses for the guest user accounts (so they now have double licenses - one from our organisation, and one from their home organisation). Some of the users are able to view/access the projects. But a couple of users are unable to access projects, despite having valid licenses assigned to their guest user accounts. 

This is a terrible implementation of sharing projects and collaborating with external users. I do not understand why Microsoft simply don't unlock the ability to share a project via a URL (exactly the same as it works with Sharepoint/Onedrive/Word/Excel/Powerpoint/etc). Is is painfully apparent that Microsoft has deliberately locked this essential feature (which you get by default with the vast majority of Microsoft services) in an attempt to try to get more people to purchase these overpriced licenses just to be able to show a project to another person. You have cashed in on 4 "guest licenses" from us, half of which doesn't even seem to work. But we are getting closer and closer to stop using MS Project. This is simply not working 

It does not work!

1. I've added a project to a team that has already guests in, the guest cannot access project stating they do not have licenses.
2. I've assigned project P3 to guest users, still no change, they cannot access the project stating they do not have a license
3. I noticed some Teams cannot have project tab added, this happens on teams that I have already guests added
4. Guests users are listed multiple times as available to be assigned tasks

Sorry guys, but this is not working at all how it should