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ArjanBroekhuizen's avatar
ArjanBroekhuizen
Iron Contributor
Jul 23, 2025

Difference between Outlook Classic and Outlook Web

Hi all, On off our users has a problem with managing calendars in Outlook. When she uses Outlook Classic to manage a delegated calendar, she gets an error that she has no rights for that. But when...
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Dan_Snape's avatar
Dan_Snape
Bronze Contributor
Jul 23, 2025

Yes..permissions are set on the mailbox, so in theory should be the same for both. You've just discovered one of the great things about Microsoft and their different clients!

  • ArjanBroekhuizen's avatar
    ArjanBroekhuizen
    Iron Contributor
    Jul 24, 2025

    Hi Dan_Snape​ 

    Indeed, great 'feature';). We have seen this more, that one day all works, and the other day it don't work any more. But most of the time all is working again the next day.
    But in this case, it isn't working at all. Is there somthing I can do in Outlook to make this working?

    • Dan_Snape's avatar
      Dan_Snape
      Bronze Contributor
      Jul 27, 2025

      You can try: a new Outlook profile, make sure that Outlook is fully patched, remove and re-add the permissions, try the same user on another device/instance of Outlook. The New Outlook might be an option to try as well.

      • ArjanBroekhuizen's avatar
        ArjanBroekhuizen
        Iron Contributor
        Jul 29, 2025

        Hi Dan_Snape​ 

        Thanks for your message and suggestions. We recently updated Outlook but this didn't solve the problem. Re-assigning the permission I did earlier, but that also didn't help.
        We are working with Citrix and therefore the users is logging in on several servers. Each night the server gets a fresh image.

        The new Outlook is not available for our organization at this moment.