Failed to create contact - unable to deserialize post body

[automatelink]

Hi there!

New users running the script that uses this module (we've been using it since November and it has been working fine) have started experiencing the following issue:

People who have been using the script are not facing any problems. It deletes contacts who are no longer Entra users, adds new ones, and updates data if it has been modified.
However, people using the script for the first time in the past few weeks are only able to add a few users. The rest of the users they try to add result in the following error line: Failed to create contact for exampleforusername because: [UnableToDeserializePostBody] : were unable to deserialize.
We don't understand where the problem lies. We suspect it might be due to a modification in the Microsoft.Graph.PersonalContacts module (we started using the 2.24 version and now is 2.26.1). This is the only thing we can think of. Can you help us?
Thank you!!

[PrzemyslawKlys]

So not sure how I can help here:

• This seems like an upgrade problem so I would try to see if downgrading for those new users works or not
• If it works, well try to use the static version of Microsoft.Graph

Of course one could go and try to investigate what is wrong and I will probably do it anyways once I will upgrade my modules internally, but Microsoft.Graph.* are the most complicated things to troubleshoot that I am explicitly delaying any upgrades if I don't have to.

[automatelink]

Thank you very much for your recommendations. After going crazy trying to do exactly what you said, I understood that O365Synchronizer updated the modules like microsoft.graph.personalcontacts to version 2.26.1. So after reading your message, I realized that I could keep the functional version (2.25.0) of these modules and force the import so that your module uses that version and not the next one, which indeed caused problems. As I said, now that I do a prior installation of the modules needed by O365Synchronizer to version 2.25.0 and an import to that version, everything works again!

Again, thank you very much, and I really appreciate your work and encourage you to keep going.