Filter on Guid for AppRoleAssignedTo.PrincipalId does not seem to work as expected

Question

See: https://github.com/microsoftgraph/msgraph-sdk-dotnet/issues/2306

Describe the bugUsing C# SDK nuget package Microsoft.Graph 5.40.0. Any time we try to create a filter like

var userId = "<GUID VALUE>";
 if(!Guid.TryParse(userId, out var userGuid))
 { 
     return false; 
 }

var appRoleAssignments = await graphClient.ServicePrincipals[ObjectId]
                     .AppRoleAssignedTo
                     .GetAsync(cfg => {
                         cfg.QueryParameters.Filter = $"principalId eq '{userGuid}'";
                         cfg.QueryParameters.Count = true;
                         cfg.Headers.Add("ConsistencyLevel", "eventual");
                     }, cancellationToken: cancellationToken)
                     .ConfigureAwait(false);
It returns the error:
Invalid filter clause: A binary operator with incompatible types was detected. Found operand types 'Edm.Guid' and 'Edm.String' for operator kind 'Equal'.

We looked at the PrincipalId and it looks to be a Guid type. So, we removed the single quotes from the filter around the userGuid value and we get the following error:
Links to EntitlementGrant are not supported between specified entities.

Are we missing some kind of grant of permissions? Our App Registration currently has Directory.Read.All that has admin consent turned on. Are we missing something?

Any guidance or links to docs for this would be greatly helpful.

Thanks!

To Reproduce
Steps to reproduce the behavior:
Use the sample code above and see if this fails for you.

Expected behavior
The code above to work with no error.

Desktop (please complete the following information):

OS: Windows 11 lates patches
Browser Edge
Version Version 120.0.2210.144 (Official build) (64-bit)
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Microsoft Visual Studio Enterprise 2022
Version 17.9.0 Preview 2.1
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Answer 1

Afaik $filter is not supported for this query. In fact, only a handful of relationships for service principal objects support $filter, as detailed for example here: https://learn.microsoft.com/en-us/graph/api/resources/serviceprincipal?view=graph-rest-beta#relationships For your scenario, get the full set of results, then filter them client-side.