When I grant somone the Send As permission it takes a long time before it's applied and the user is granted the permission. I found this article http://technet.microsoft.com/en-us/library/bb684892(EXCHG.80).aspx but was hoping someone could tell me if there is a way to tell what time the next cache refresh will take place? We're running Exchange 2007. Thank you!

What is a long time? From the following link: http://technet.microsoft.com/en-us/library/aa998291(EXCHG.80).aspx The Send As permission is not granted until after replication has occurred. Replication times depend on your Microsoft Exchange and network configuration. To grant the permission immediately, stop and then restart the Microsoft Exchange Information Store service. Tim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

I'm not sure exactly how long it takes because i usually get tired of trying but it's always working by the next day. Won't restarting the Microsoft Exchange Information Store during business hours impact users?

Yes it will impact users. Are the DC's that Exchange are using the same as what your users are authenticating against?Tim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

Yes.

Found this other post, it has a registry change to speed up changes. Read the post... http://social.technet.microsoft.com/Forums/en-GB/exchangesvradmin/thread/5ad3f5ca-9e44-4dcc-bda6-7dbba97f52e7 Tim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

Thank you but this article only confirms everything in the link in my first post. What I was hoping to find out is if there is a way to tell what time the next cache refresh will take place?

Exchange refreshes that cache every 2 hours. I dont know of a way to tell when the next refresh would be.

Hi, Chris is quite right, yes it takes 2 hours by default. Below is the details from this link : http://social.technet.microsoft.com/Forums/en-US/exchangesvradmin/thread/bd3f0b5b-5fe8-457a-904f-2d34b8c057b1 The information store caches information contained in the directory store and, by default, it re-reads it every 120 minutes. Therefore, any change to a directory object is not reflected in the information store for two hours. If thestore is busy then this may take longer. The fastest way to update store cache is by restarting the Information storeservice. So, for immediate results a restart of the Information store is necessary and if this process is left alone it will take a couple of hours to reflect changes, depending on how busy the store is. The entries in the MBI cache are controlled by two registry settings. The Mailbox Cache Age Limit setting and the Mailbox Cache Idle Limit setting control how long the entries in the MBI cache survive. The default values for these settings are 120 minutes and 15 minutes. Mailbox Cache Idle Limit has been set http://technet.microsoft.com/en-us/library/aa996988(EXCHG.80).aspx To have changes to directory objects picked up immediately by the information store, follow these steps: 1. Run Registry Editor (Regedt32.exe). 2. Locate the following key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\ParametersSystem 3. On the Edit menu, click Add Value. 4. Enter Mailbox Cache Age Limit for the Value name. 5. Type REG_DWORD for the Data type. 6. Type 1 for the Data of type DECIMAL, and then click OK. NOTE: This registry entry is not a switch, it is a setting. If it is set to 1 the server rereads the cache every minute; if it is set to 2 the server rereads the cache every 2 minutes, and so forth. 7. Stop the information store service. 8. Restart the information store service. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS\ParametersSystem\Mailbox Cache Idle Limit This value is in minutes. Make sure that the Cache Idle Limit value is not greater than the Mailbox Cache Age Limit value. The default value is 15 minutes. If the Cache Idle Limit value is set higher than the Mailbox Cache Age Limit value, then Cache Idle Limit value will be equal to the Mailbox Cache Age Limit value. Note: AD replication will happen 15 minutes, during that time Exchange performance will be affected. So please do not change the time to short. Besides, if the OS for Exchange Server is Windows Server 2003, then please check if you have RSS and TCP Offload enabled. Windows 2003 Scalable Networking pack and its possible effects on Exchange http://msexchangeteam.com/archive/2007/07/18/446400.aspx An update to turn off default SNP features is available for Windows Server 2003-based and Small Business Server 2003-based computers http://support.microsoft.com/kb/948496/en-us Regards,Laeeq Qazi|Team Lead(Exchange + Sharepoint + BES + DynamicsCRM) www.HostingController.com

You can also initiate a move mailbox and then cancel it. This will enforce the permission right away.shalini

I have had failed and canceled mailbox moves turn into split mailboxes which are a pain to deal with.