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Defender email tokens are not being sent via Exchange; Defender warning "Failed to send 0x80004005" and "The server response was: 5.7.1" is seen in the Defender log (233599)

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Product(s):
Defender
5.10, 5.9.6, 5.9.5, 5.9.3, 5.9.1, 5.8.2, 5.8.1
Topic(s):
Troubleshooting
Article History:
Created on: 10/12/2017
Last Update on: 3/22/2019
Author:
Adrian Hensler
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