Using New Outlook on Windows for professional communication and productivity
Hello Mateusz Kowalski,
Thank you for reaching out.
Based on the available Microsoft guidance, users can manually pin supported applications by selecting More apps > Pin, while administrators can control whether an application is available or deployed. However, I could not find an official Microsoft document explaining why certain applications in More apps display only Open and do not provide the Pin option.
To further check this behavior, please sign in to Outlook on the web, open More apps, and check the same application:
- If the web version also shows only Open, the application may not currently support being pinned, or the option may be restricted by your organization’s configuration.
- If Pin is available on the web but not in new Outlook, please update new Outlook, restart the application, and test again.
Please also check whether your colleagues can pin the same application. If other users can pin it but you cannot, your IT administrator may need to review the application assignment or policy applied to your account or user group.
If no one in your organization sees the Pin option for the application, the application likely does not currently support pinning in Outlook. In that case, your IT administrator may need to contact the application developer to confirm whether this feature is supported.
I hope this information helps.
Best regards,