Organizing and accessing contact information in Outlook on the web for business
Hi Hicham,
Good day and thank you for the detailed information you have provided. I fully understand the challenge you are facing, especially when working with such a large volume of contacts.
Given the scale of the operation (around 29,000 contacts) and the limitations encountered with standard export and deletion methods, this scenario would benefit from a more in-depth review within your specific environment.
With that in mind, raising a support ticket with Microsoft 365 Support would likely be the most appropriate next step. Considering both the volume of data involved and the importance of completing the export and cleanup safely, the support team is best positioned to assess your setup in detail and guide you toward a more efficient and supported approach. They can also help provide guidance to minimize the risk of unintended data loss and ensure the process is carried out in a way that maintains data integrity.
For guidance on how to request support in the Microsoft 365 Admin Center, please refer to: Get support - Microsoft 365 admin.
Note: If you are an end-user, you can reach out to your IT admin to create a support ticket.
In case you do not know who is your IT admin, kindly refer to this article: How do I find my Microsoft 365 admin? - Microsoft Support
If you have not yet raised a support request, I would kindly recommend doing so at your convenience, as this will allow the team to work with you directly and provide more targeted assistance.
Thank you for your understanding, and please feel free to leave a comment if you have additional questions.
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