Unable to send an email on SMTP

activities
error
#1

Hello all

i am facing the below error while i am going to send an email through smtp , we are using the Microsoft exchange in our environment , please see below and advise for further way forward

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thanks for support

#2

From the error message it is very clear that you are providing invalid credentials.
Please check login credentials.

Regards,
Karthik Byggari

#3

its showing this one now

image

#4

Please check below link -

Regards,
Karthik Byggari