hello,my problem is when i make discovery process does not find computersmy event id : 28005An exception occurred while enqueueing a message in the target queue. Error: 15517, State: 1. Cannot execute as the database principal because the principal "dbo" does not exist, this type of principal cannot be impersonated, or you do not have permissiowhen i researching to resolve this problem i follow this article ID : 938994 but untill now i can't resolve the problem and the discovery process does't completeplease need help .MCP MCSA MCSE MCT

Hello yasser, To resolve the Event 28005, try this KB article: You cannot run a statement or a module that includes the EXECUTE AS clause after you restore a database in SQL Server 2005 http://support.microsoft.com/kb/913423/en-us For the question that discovery process will not complete, these same symptoms happen when the SQL Service Broker is disabled. To check this, run the following query in SQL Management Studio: SELECT is_broker_enabled FROM sys.databasesWHERE name = 'OperationsManager' If this returns "0", then it is not enabled. Run the following qeury to enable it: ALTER DATABASE OperationsManager SET ENABLE_BROKERThanks,Yog Li - MSFT

Hello yasser,If the above steps cannot help, please post some detailed information about your SCE server. For example: Is it SCE SP1 or SCE RTM? Is it a new server? Did you run the Feature Configuration Wizard? Did the server work normallybefore?Thanks,Yog Li - MSFT

Hello yasser,If the above steps cannot help, please post some detailed information about your SCE server. For example: Is it SCE SP1 or SCE RTM? Is it a new server? Did you run the Feature Configuration Wizard? Did the server work normallybefore?Thanks, Yog Li - MSFT hello Yog Lii used SCE sp1 my sce server was working probably before , i am not ran thr feature configuration wizard ..please need help.MCP MCSA MCSE MCT

Hello yasser, To resolve the Event 28005, try this KB article: You cannot run a statement or a module that includes the EXECUTE AS clause after you restore a database in SQL Server 2005 http://support.microsoft.com/kb/913423/en-us For the question that discovery process will not complete, these same symptoms happen when the SQL Service Broker is disabled. To check this, run the following query in SQL Management Studio: SELECT is_broker_enabled FROM sys.databasesWHERE name = 'OperationsManager' this returns with 1 = broker is enableddo you have any solution ?MCP MCSA MCSE MCT

need help ?MCP MCSA MCSE MCT

Hello yasser, The Feature Configuration Wizard is the first step administrators should take to configure System Center Essentials (this should be done before installing the OpsMgr agent on clients). The wizard is launched by clicking on Required: Configure important features from the Computers Overview screen or from any other overview screen. After the initial run, the Feature Configuration Wizard is launched by accessing the Administration screen and selecting the Configure product features action item. Click the link below for more information about this wizard: System Center Essentials 2007 Feature Configuration Wizardhttp://technet.microsoft.com/en-us/library/bb437373.aspx Thanks. Yog Li - MSFT

Dear Yog Limy SCE working before prbably and it is a new issuemay started when i changed my domain admin password.....MCP MCSA MCSE MCT

Hello Yasser, This could be the root cause. Please open SCE console and navigate to the Administration space and choosing the Run As Accounts tab. Here you can change passwords and accounts of the action accounts. You can read this article for more details: http://dnn.ebsfaq.com/SCE2007/noalertsshowingupinSCE/tabid/1342/language/en-US/Default.aspx Thanks,Yog Li - MSFT

Dear Yog Listill have the same problem An exception occurred while enqueueing a message in the target queue. Error: 15517, State: 1. Cannot execute as the database principal because the principal "dbo" does not exist, this type of principal cannot be impersonated, or you do not have permission.need help .................. MCP MCSA MCSE MCT

Hi,Did you change the database owner to a valid login or domain user by following the KB 913423?Yog Li - MSFT

when i change the database owner according the KB 913423this message is shown Msg 15110, Level 16, State 1, Line 1 The proposed new database owner is already a user or aliased in the database. MCP MCSA MCSE MCT

please need help ?????????????????????????????????????????????MCP MCSA MCSE MCT

Hello yasser,Sorry to hear the problem still exists. Ifthere's nota solution on this forum,you cancontact Microsoft Customer Support Service(CSS) and submit a request so that this problem can be resolved efficiently. To obtain the phone numbers for specific technology request please take a look at the web site listed below: System Center Essentials 2007 Solution Centerhttps://support.microsoft.com/oas/default.aspx?gprid=12684Thanks,Yog Li - MSFT