Unable To Create Teams Meetings in Outlook Desktop Application

I have a user with an unusual problem. They manage several email accounts for senior members of staff and in one of these accounts the ability to generate a Teams meeting via the Outlook Desktop app is not possible. They can create one using OWA but across multiple devices when they login to the Outlook application they either create the meeting and then when the Teams meeting option is selected they see an error stating "We couldn't schedule the meeting please try again later" or the meeting is generated with the Teams option enabled but there are none of the links or blurb about the meeting being available in Teams and recipients see this a just an ordinary calendar event. I would normally ascribe this to a local problem with the application, profile or a permissions issue as it's all managed on the server end (our O365 is all managed in the cloud) and these accounts aren't added locally but it's also happening on a completely different device which they had never used before. I asked that I get the same permissions setup but I can't replicate the problem on my device- under my account. They can generate the Teams meeting in OWA but neither the legacy or new version of Outlook will work for them. Has anybody any ideas what is the cause of this issue?