I came across this while actually looking for something else but it does go some way to answering another question that gets asked occasionally. If you want to use the information in the GAL (eg Active Directory) for phone numbers and address’s ect how up to date is this information eg can I find out the last time it was updated. While maybe not 100% accurate one method that you maybe able to use is to use the Metadata from Active Directory which stores information about when the last time each property was updated and replicated in Active directory. To access the metadata from a script you need to use the iadstools.dll which comes as part of the Windows 2000/3 Support Tools package which can be found on the server CD in Support\Tools folder. Robbie Allen has put together a number of samples on using the objects in this DLL in his Active Directory cookbook which is worth checking out here . For this script I’ve expanded greatly on one of his samples by including a query of ever m
Pushing the Envelope in Messaging and Office 365 Development