Tag Archives: an-error-occurred-microsoft-rtc-common-data-sqlconnectionexception-a-network-related-or-instance-specific-error-occurred-while-establishing-a-connection-to-sql-server

OCS 2007 R2 – The Identity of Application Pool LSGroupExpAppPool is Invalid

Event ID: 5021

Source: Windows Process Activation Service (WAS)

The identity of application pool LSGroupExpAppPool is invalid. The user name or password that is specified for the identity may be incorrect, or the user may not have batch logon rights. If the identity is not corrected, the application pool will be disabled when the application pool receives its first request. If batch logon rights are causing the problem, the identity in the IIS configuration store must be changed after rights have been granted before Windows Process Activation Service (WAS) can retry the logon. If the identity remains invalid after the first request for the application pool is processed, the application pool will be disabled. The data field contains the error number.


The issue was caused by a Group Policy that was conflicting with the rights applied by the OCS installation to the ‘Log on as a batch job’ and ‘Log on as a service’ user rights in the Local Security Policy on the OCS server.

The fix is to ensure that the RTC Service and RTCComponentService accounts have the ‘Log on as a batch job’ and ‘Log on as a service’ user rights on the OCS server. This right can be found in Local Security Policy > Computer Configuration > Windows Settings > Local Policies > User Rights Assignment. Either remove the conflicting Group Policy and fix the Local Policy or add the rights to the Group Policy.

Thanks to


Turn on Presence: Microsoft #Lync™ Server Standard CAL + Core CAL Promotion

I just found this on http://www.microsoftincentives.com/product.aspx?id=10110 

I’m not sure for what regions this apply but if you are planning on getting Lync anytime soon it might be good to have 50% of from the CALs. Read more for the full details.


Now through December 31st 2010, Microsoft is offering special discounts of up to 50% on Microsoft Lync™ Server Standard Client Access Licenses (CALs) with the purchase of Core CAL or Professional Desktop. This limited-time offer provides a cost-effective way for new and renewing customers to turn on presence and instant messaging in Exchange Server, SharePoint Server and Office on every desktop.


  • Eligibility: The promotional pricing is available to customers who are acquiring new or renewal Core CAL or Professional Desktop on Open Value, Select, Enterprise Agreement, and Enterprise Agreement Subscription AND attaching Office Communications Server Standard CAL to the Core CAL purchase. 
  • Requirements: Customers must obtain the same number of Office Communications Server Standard CAL as the Core CAL they own.
  • Discounts: Up to 50% off of Microsoft pricelist for Office Communications Server Standard CAL.

Microsoft Lync™ Server is one of Microsoft’s Unified Communications solutions, and along with Exchange Server, provides the platform for presence, instant messaging, along with peer to peer voice and video chat. An IDC study in March 2010 shows a positive 250% ROI and a payback period of less than a year for organizations that have deployed Microsoft’s presence and instant messaging solutions.

Learn More about Microsoft Lync™ Server at http://www.microsoft.com/en-us/lync/default.aspx.


Contact your Microsoft Partner today to find out how to take advantage of this time limited offer. Our qualified partners can run you through a product briefing and demo, a UC Business Value Assessment, and provide trial software, evaluation guidance, and support.

To find your local Microsoft Reseller, visit http://pinpoint.microsoft.com/.

Save hours: Exchange 2010 can not create new database

I got a fresh installed Exchange 2010 and I just wanted to add one more database. I could do Everything else but when adding a database I got the error:

Microsoft Exchange Error
Failed to mount database ‘Mailbox’.
Active Directory operation failed on bdc3.propel.com. This error is not retriable. Additional information: Access is denied.
Active directory response: 00000005: SecErr: DSID-03151E04, problem 4003 (INSUFF_ACCESS_RIGHTS), data 0
The user has insufficient access rights.


The solution was simple after an hour on google and in the forums.

Just re-run the setup with /preparedomain and it will solve the problem.

Or actually it created the database just fine, but didn’t mount it.. So just wait a few minutes and then try again and it will mount.