Insufficient access rights to perform the operation. Active directory response: 00002098: SecErr: DSID-03150F94, problem 4003

Hi @abdi mreza

What is the detailed command you are using to create new mailboxes?

Please have a check in Active Directory Users and Computers if the server is a member of the Exchange Trusted System.

If this issue occurs when you try to modify or enable mailboxes for users in a specific OU, please follow these steps to ensure Exchange Trusted Substystem has the required permissions:

• Open Active Directory Users and Computers.
• Click View, and then click Advanced Features.
• Right-click the OU that contains the user and then click Properties.
• In the Security tab, click Advanced.
• In the Permissions tab, click Add.
• In the Enter object name to select box, type Exchange trusted subsystem, and then click OK.
• In the Object tab, select This object and all descendant’s objects in the Apply onto list, locate Modify Permissions in the Permissions list, and then set it to Allow.
• Click OK
• Make sure above option is checked on all OU’S listed in the object path of the user object

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Hi there,

This might be due to the permission inheritance . Check the following setting and see if this can help you.

-Open ADSIEdit -> Configuration container
-Services -> Microsoft Exchange -> First Organization -> Administrative Groups -> Exchange Administrative Group (FYDIBOHF23SPDLT)
-Double-click on it, under the Security tab. Choose Exchange Trusted Subsystem, check the full access permission, and enable inheritance (If it's enabled, disable then enable it).

You can also try other troubleshooting steps from this article
https://learn.microsoft.com/en-us/exchange/troubleshoot/administration/insufficient-access-rights-perform-operation

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