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MichailPappas-8872 asked MichailPappas-8872 commented

Server 2003 dcdiag reports: "Warning :There is less than 9% available RIDs in the current pool"

Upon an investigation carried out for some entirely other purpose, the following message came up when running on our Server 2003 R2 (soon to be decommissioned) that holds the PDC roles of our AD:

Starting test: RidManager
Available RID Pool for the Domain is 3106 to 1073741823
mysrv.mydomain is the RID Master
DsBind with RID Master was successful
rIDAllocationPool is 2606 to 3105
rIDPreviousAllocationPool is 1606 to 2105
rIDNextRID: 2061
* Warning :There is less than 9% available RIDs in the current pool
......................... MYSRV passed test RidManager

Now, if I understand correctly, there is no issue of exhaustion here: the current pool is at 3106 and there are a billion RIDs to work with. Since the warning came up I thought that the counting was downwards to zero and got freaked up. But reading around it seems that it is counting up to 1073741823. Therefore, can I presume that all is well? And, if so, why did this warning came up (and cut 10 years from my life)?

windows-server
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FanFan-MSFT avatar image
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FanFan-MSFT answered MichailPappas-8872 commented

Hi,

This states that the RID pool is about to exhaust in that specific domain controller. When the RID pool is completely exhausted, the Domain Controller in question will contact the RID master to get a new pool allocated to it.
For now, it is suggested to check if the RID Master have any issues.

You can check FSMO holders by run command:
Netdom query fsmo

You may run following command to confirm the status of all your DCs.
ipconfig /all
Results of a dcdiag /v > c:\dcdiag.txt
Repadmin /showrepl >C:\repl.txt
Repadmin /showreps *
Check if there are any event log errors on all the DCs

Best Regards,

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Thanks I was afraid that it was the total RID pool that would be exhausted. You've explained clearly that this is not the case.

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