| Version Number |
Service Pack |
Release Date |
| 4.0.837.10 |
Microsoft Exchange Server 4.0 RTM |
April 1996 |
| 4.0.838.15 |
Microsoft Exchange Server 4.0 SP1 |
May 1996 |
| 4.0.993.40 |
Microsoft Exchange Server 4.0 SP2 (4.0a) |
August 1996 |
| 4.0.994.64 |
Microsoft Exchange Server 4.0 SP3 |
November 1996 |
| 4.0.995.54 |
Microsoft Exchange Server 4.0 SP4 |
April 1997 |
| 4.0.996.00 |
Microsoft Exchange Server 4.0 SP5 |
May 1998 |
| | | |
| 5.0.1457.10 |
Microsoft Exchange Server 5.0 RTM |
March 1997 |
| 5.0.1458.50 |
Microsoft Exchange Server 5.0 SP1 |
June 1997 |
| 5.0.1460.13 |
Microsoft Exchange Server 5.0 SP2 |
February 1998 |
| | | |
| 5.5.1960 |
Microsoft Exchange Server 5.5 RTM |
February 1998 |
| 5.5.2232 |
Microsoft Exchange Server 5.5 SP1 |
July 1998 |
| 5.5.2448 |
Microsoft Exchange Server 5.5 SP2 |
December 1998 |
| 5.5.2650 |
Microsoft Exchange Server 5.5 SP3 |
September 1999 |
| 5.5.2653 |
Microsoft Exchange Server 5.5 SP4 |
November 7, 2000 |
| | | |
| 6.0.4417 |
Microsoft Exchange Server 2000 RTM |
October 2000 |
| 6.0.4712 |
Microsoft Exchange Server 2000 SP1 |
July 2001 |
| 6.0.5762 |
Microsoft Exchange Server 2000 SP2 |
December 2001 |
| 6.0.6249 |
Microsoft Exchange Server 2000 SP3 |
July 18, 2002 |
| 6.0.6396.1 |
Microsoft Exchange Server 2000 post-SP3 |
March 2003 |
| 6.0.6487 |
Microsoft Exchange Server 2000 post-SP3 |
August 27, 2003 |
| 6.0.6556 |
Microsoft Exchange Server 2000 post-SP3 |
April 2004 |
| 6.0.6603.1 |
Microsoft Exchange Server 2000 post-SP3 |
August 16, 2004 |
| 6.0.6617.52 |
Microsoft Exchange Server 2000 post-SP3
with Security Update MS05-021 |
April 12, 2005 |
| | | |
| 6.5.6944 |
Microsoft Exchange Server 2003 RTM |
October 2003 |
| 6.5.7226 |
Microsoft Exchange Server 2003 SP1 |
May 2004 |
| 6.5.7638 |
Microsoft Exchange Server 2003 SP2 |
October 19, 2005 |
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