Sign in with Microsoft
Sign in or create an account.
Select a different account.
You have multiple accounts
Choose the account you want to sign in with.


Assume that you have 1000 mailbox databases in your Microsoft Exchange Server 2010 environment. When you try to create a new mailbox database, the operation fails. Additionally, you receive the following error message:

Current search restrictions cause too many objects to be returned from <FQDN of DC>.


This issue occurs because the New-MailboxDatabase cmdlet does not use the Lightweight Directory Access Protocol (LDAP) paged search when the cmdlet tries to retrieve the Active Directory system configuration session. However, the default maximum page size is set to 1000. Therefore, the Active Directory system configuration session returns ADSizelimitExceededException unexpectedly when you try to create the 1001th mailbox database.


To resolve this issue, install the following update rollup:

2608646 Description of Update Rollup 6 for Exchange Server 2010 Service Pack 1


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information

For more information about how to create a mailbox database, visit the following Microsoft website:

General information about how to create a mailbox databaseFor more information about the New-MailboxDatabase cmdlet, visit the following Microsoft website:

General information about the New-MailboxDatabase cmdlet

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Was this information helpful?

What affected your experience?
By pressing submit, your feedback will be used to improve Microsoft products and services. Your IT admin will be able to collect this data. Privacy Statement.

Thank you for your feedback!