How is your flow created? Could you share more details on the error message?
I assume that you are trying to create user in Azure AD when an item is created in SharePoint list, and you will fill in a number in the Business Phone field.
So I made the following test to try to insert the SharePoint list column phonnumber (type of number) into the Business phone field. However, it worked fine and I cannot reproduce this issue on my side.
Please share more details, I will try to reproduce this issue on my side.
Community Support Team _ Mabel Mao If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.