Is it possible to increase the RID pool? if yes how?

Yes, it is possible to increase the RID (Relative Identifier) pool in an Active Directory (AD) domain. The RID pool is a range of unique identifiers that are used to create security principals, such as user and computer accounts, within the domain. If the RID pool becomes depleted, new security principals cannot be created, which can impact the functionality of the domain. To avoid this, you can increase the RID pool size by modifying the “RID Set” object in the AD database using the “ntdsutil” command-line utility.

Here are the steps to increase the RID pool size:

1. Open a Command Prompt with administrative privileges.
2. Type “ntdsutil” and press Enter.
3. Type “activate instance ntds” and press Enter.
4. Type “set dsrm password” and press Enter. This sets the Directory Services Restore Mode (DSRM) password, which is required to perform certain operations in AD.
5. Type “quit” and press Enter.
6. Type “ntdsutil” again and press Enter.
7. Type “activate instance ntds” again and press Enter.
8. Type “set database config” and press Enter.
9. Type “set maximald” and press Enter. This sets the maximum size of the RID pool.
10. Type the new maximum size of the RID pool in bytes. For example, to set the maximum size to 500 MB, type “500000000” and press Enter.
11. Type “commit changes” and press Enter. This commits the changes to the AD database.
12. Type “quit” and press Enter.

After increasing the RID pool size, you should monitor the RID pool to ensure that there are enough RIDs available for new security principals to be created. You can use the “Active Directory Users and Computers” console or the “ntdsutil” command-line utility to view the current RID pool size and the next RID to be allocated. If necessary, you can increase the RID pool size again using the same steps.

So, that’s all in this blog. I will meet you soon with next stuff. Have a nice day!!!

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