Look like according to this: http://support.microsoft.com/kb/2201236 this bug was fixed in Exchange 2007, but on my 2010 SP2 14.2 247.5 it's still present! Is there any way to fix this?

Unfortunately I wasn't able to install RU3 because of: MSI (c) (58:E4) [10:22:28:205]: Note: 1: 1729 MSI (c) (58:E4) [10:22:28:205]: Note: 1: 2262 2: Error 3: -2147287038 MSI (c) (58:E4) [10:22:28:205]: Transforming table Error. MSI (c) (58:E4) [10:22:28:205]: Transforming table Error. MSI (c) (58:E4) [10:22:28:205]: Note: 1: 2262 2: Error 3: -2147287038 MSI (c) (58:E4) [10:22:28:205]: Transforming table Error. MSI (c) (58:E4) [10:22:28:205]: Transforming table Error. MSI (c) (58:E4) [10:22:28:205]: Note: 1: 2262 2: Error 3: -2147287038 MSI (c) (58:E4) [10:22:28:205]: Note: 1: 2262 2: Error 3: -2147287038 MSI (c) (58:E4) [10:22:28:205]: Transforming table Error. MSI (c) (58:E4) [10:22:28:205]: Transforming table Error. MSI (c) (58:E4) [10:22:28:205]: Note: 1: 2262 2: Error 3: -2147287038 MSI (c) (58:E4) [10:22:28:205]: Transforming table Error. MSI (c) (58:E4) [10:22:28:205]: Transforming table Error. MSI (c) (58:E4) [10:22:28:205]: Note: 1: 2262 2: Error 3: -2147287038 MSI (c) (58:E4) [10:22:28:220]: Product: Microsoft Exchange Server -- Configuration failed. MSI (c) (58:E4) [10:22:28:220]: Windows Installer reconfigured the product. Product Name: Microsoft Exchange Server. Product Version: 14.2.247.5. Product Language: 1033. Manufacturer: Microsoft Corporation. Reconfiguration success or error status: 1603. MSI (c) (58:E4) [10:22:28:220]: Grabbed execution mutex. MSI (c) (58:E4) [10:22:28:220]: Cleaning up uninstalled install packages, if any exist MSI (c) (58:E4) [10:22:28:220]: MainEngineThread is returning 1603

Hi there, I'd suggest you run systeminfo to verify if the hotfix 2549255 has been setup correctly. If the issue continues, please check ExchangeSetupLog to see if there is RU2 is installed completely. Hope it is helpful. Fiona Liao TechNet Community Support

Reinstalled RU2 just in case, restarted & installed RU3. Still can't see any in 2549255 in systeminfo: : CAS01.ad.company.ru. [PS] C:\Windows\system32>systeminfo м : CAS01 : Microsoft Windows Server 2008 R2 Enterprise : 6.1.7601 Service Pack 1 7601 : Microsoft Corporation м : : Multiprocessor Free : Windows : : 55041-013-4977582-84725 : 09.12.2011, 8:00:55 м м: 01.06.2012, 14:49:03 м: VMware, Inc. м: VMware Virtual Platform м: x64-based PC (): - 4. [01]: Intel64 Family 6 Model 44 Stepping 2 GenuineIntel ~2666 [02]: Intel64 Family 6 Model 44 Stepping 2 GenuineIntel ~2666 [03]: Intel64 Family 6 Model 44 Stepping 2 GenuineIntel ~2666 [04]: Intel64 Family 6 Model 44 Stepping 2 GenuineIntel ~2666 BIOS: Phoenix Technologies LTD 6.00, 15.04.2011 Windows: C:\Windows м : C:\Windows\system32 : \Device\HarddiskVolume1 м: ru; : ru; : (UTC+04:00) , , - м м: 8 192 м: 4 358 м: . м: 16 381 м: : 9 120 м: : 7 261 : C:\pagefile.sys м: ad.company.ru : \\dc (): - 80. [01]: KB982861 [02]: 982861 [03]: KB2425227 [04]: KB2484033 [05]: KB2488113 [06]: KB2492386 [07]: KB2503665 [08]: KB2505438 [09]: KB2506014 [10]: KB2506212 [11]: KB2506928 [12]: KB2507618 [13]: KB2508272 [14]: KB2509553 [15]: KB2510531 [16]: KB2511250 [17]: KB2511455 [18]: KB2512715 [19]: KB2515325 [20]: KB2518869 [21]: KB2522422 [22]: KB2529073 [23]: KB2530548 [24]: KB2533552 [25]: KB2536275 [26]: KB2536276 [27]: KB2539635 [28]: KB2541014 [29]: KB2544893 [30]: KB2545698 [31]: KB2547666 [32]: KB2552343 [33]: KB2556532 [34]: KB2560656 [35]: KB2562937 [36]: KB2563227 [37]: KB2564958 [38]: KB2567680 [39]: KB2570791 [40]: KB2570947 [41]: KB2572077 [42]: KB2584146 [43]: KB2585542 [44]: KB2586448 [45]: KB2588516 [46]: KB2603229 [47]: KB2604115 [48]: KB2607047 [49]: KB2607576 [50]: KB2608658 [51]: KB2617657 [52]: KB2618451 [53]: KB2620704 [54]: KB2620712 [55]: KB2621440 [56]: KB2631813 [57]: KB2633952 [58]: KB2636573 [59]: KB2640148 [60]: KB2641690 [61]: KB2643719 [62]: KB2644615 [63]: KB2645640 [64]: KB2653956 [65]: KB2654428 [66]: KB2656356 [67]: KB2656373 [68]: KB2656411 [69]: KB2658846 [70]: KB2659262 [71]: KB2660075 [72]: KB2667402 [73]: KB2675157 [74]: KB2676562 [75]: KB2679255 [76]: KB2688338 [77]: KB2690533 [78]: KB2695962 [79]: KB976902 [80]: KB982018 : - 1. [01]: Intel(R) PRO/1000 MT м : DHCP : IP- [01]: 192.168.1.68 [PS] C:\Windows\system32>