The exchange test client receives the Moved Temporarily packet and ack's and retries with the new address.

Asterisk receives the Moved Temporarily and does nothing afterwards.

Working TCP SIP connection to Exchange 2007 using exchange test client
===========================================
7	4.562554		exchange	client	SIP	SIP: Response: SIP/2.0 100 Trying
8	4.563557		exchange	client	SIP	SIP: Response: SIP/2.0 302 Moved Temporarily
9	4.563557		client	exchange	TCP	TCP: Flags=....A..., SrcPort=4418, DstPort=5060, Len=0, Seq=3828015713, Ack=2377995050, Win=64802 (scale factor 0) = 0
10	4.565563		client	exchange	SIP	SIP: Request: ACK sip:Anonymous@swordfish.coloflorida.com:5060 SIP/2.0
11	4.565563		exchange	client	TCP	TCP: Flags=....A..., SrcPort=5060, DstPort=4418, Len=0, Seq=2377995050, Ack=3828015831, Win=65535 (scale factor 0) = 0



Non-working TCP SIP connection to Exchange 2007 using asterisk
===============================================
1979	75.052734		client	exchange	TCP	TCP: Flags=....A..., SrcPort=52169, DstPort=5060, Len=0, Seq=4046486307, Ack=1567121780, Win=1728 (scale factor 0) = 0
1980	75.052734		exchange	client	SIP	SIP: Response: SIP/2.0 302 Moved Temporarily
1981	75.052734		client	exchange	TCP	TCP: Flags=....A..., SrcPort=52169, DstPort=5060, Len=0, Seq=4046486307, Ack=1567122170, Win=1996 (scale factor 0) = 0