http://blogs.technet.com/b/exchange/archive/2005/06/27/406901.aspxAfter helping someone on the problem related to this not that long ago - I decided it might be good to blog about this a bit more; there might be more people that are running into this problem and it is not one of most obvious ones either! Whaten-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/exchange/archive/2005/06/27/406901.aspx#407181Fri, 01 Jul 2005 13:19:52 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:407181subject: exchange<div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=407181" width="1" height="1">http://blogs.technet.com/b/exchange/archive/2005/06/27/406901.aspx#407177Fri, 01 Jul 2005 13:18:28 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:407177subject: exchange<div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=407177" width="1" height="1">http://blogs.technet.com/b/exchange/archive/2005/06/27/406901.aspx#407173Fri, 01 Jul 2005 13:17:49 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:407173subject: exchange<div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=407173" width="1" height="1">http://blogs.technet.com/b/exchange/archive/2005/06/27/406901.aspx#407169Fri, 01 Jul 2005 13:16:07 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:407169subject: exchange<div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=407169" width="1" height="1">http://blogs.technet.com/b/exchange/archive/2005/06/27/406901.aspx#406992Tue, 28 Jun 2005 22:43:04 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:406992ExchangeThanks Gene - good point - we have definitely seen some of that in Support too, when there are 1 way connection agreements...<div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=406992" width="1" height="1">http://blogs.technet.com/b/exchange/archive/2005/06/27/406901.aspx#406942Tue, 28 Jun 2005 17:38:19 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:406942GeneHello Nino, <br> <br>Thanks for your post! <br> <br>I wanted to add another case where you can have this attribute populated: Pure Exchange 2000/2003 Admin Groups and Group Membership. <br> <br>If you setup a one-way CA between Pure 2000/2003 AG and SRS, you may have problems replicating Group membership updates from 5.5 back to AD. If a mailbox from pure AG gets replicated to 5.5 Site A and then gets added to a 5.5 DL in Site B, then this addition will not be replicated back to AD because ADC can't find a match in AD when it searches msExchADCGlobalNames in AD. So it writes to unmergedAtts attribute. <br>Once you convert the CA to a two-way, the ADC will clean up unmergedAtts attribute and replicate the Group membership back to AD.<div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=406942" width="1" height="1">