Postfix & Office 365

I’m having issues sending voicemail alerts with Postfix. However all other email alerts are working via Postfix and office 365. For example in the “voicemail user portal” I can click on a specific VM then select an email address and click “email_to” button and the email sends thru no problem. However when I can another user and leave a voicemail the message gets bounced. Both relayed emails are from the same “from” address. See mail logs below:

WORKING EXAMPLE FROM USER PORTAL: (I replaced the domain name)
Aug 21 16:20:37 copier postfix/pickup[1773]: 31C3C2220EC: uid=499 from=
Aug 21 16:20:37 copier postfix/cleanup[2953]: 31C3C2220EC: message-id=[email protected]
Aug 21 16:20:37 copier postfix/qmgr[1774]: 31C3C2220EC: from=[email protected], size=116223, nrcpt=1 (queue active)
Aug 21 16:20:37 copier postfix/smtp[2955]: warning: smtp.office365.com[157.56.233.66]:587 offered null AUTH mechanism list
Aug 21 16:21:02 copier postfix/smtp[2955]: 31C3C2220EC: to=[email protected], relay=smtp.office365.com[157.56.233.66]:587, delay=26, delays=0.01/0/24/1.7, dsn=2.6.0, status=sent (250 2.6.0 [email protected] [InternalId=17733919967590] Queued mail for delivery)
Aug 21 16:21:02 copier postfix/qmgr[1774]: 31C3C2220EC: removed

NON WORKING EXAMPLE AFTER CALL & VM:
Aug 21 16:23:48 copier postfix/qmgr[1774]: EB33E2220EE: from=[email protected], size=265734, nrcpt=1 (queue active)
Aug 21 16:23:49 copier postfix/smtp[3238]: warning: smtp.office365.com[132.245.1.114]:587 offered null AUTH mechanism list
Aug 21 16:23:59 copier postfix/smtp[3238]: EB33E2220EE: to=[email protected], relay=smtp.office365.com[132.245.1.114]:587, delay=11, delays=0.03/0/5.4/5.5, dsn=5.7.1, status=bounced (host smtp.office365.com[132.245.1.114] said: 550 5.7.1 Client does not have permissions to send as this sender (in reply to end of DATA command))
Aug 21 16:23:59 copier postfix/cleanup[3235]: E5F862220EF: message-id=[email protected]
Aug 21 16:23:59 copier postfix/bounce[3247]: EB33E2220EE: sender non-delivery notification: E5F862220EF
Aug 21 16:23:59 copier postfix/qmgr[1774]: E5F862220EF: from=<>, size=2573, nrcpt=1 (queue active)
Aug 21 16:23:59 copier postfix/qmgr[1774]: EB33E2220EE: removed
Aug 21 16:24:00 copier postfix/smtp[3238]: warning: smtp.office365.com[132.245.1.121]:587 offered null AUTH mechanism list
Aug 21 16:24:07 copier postfix/smtp[3238]: E5F862220EF: to=[email protected], relay=smtp.office365.com[132.245.1.121]:587, delay=7.5, delays=0/0/2.3/5.2, dsn=5.7.1, status=bounced (host smtp.office365.com[132.245.1.121] said: 550 5.7.1 Client does not have permissions to send as this sender (in reply to end of DATA command))
Aug 21 16:24:07 copier postfix/qmgr[1774]: E5F862220EF: removed

Also forgot to mention I can send email no problem with:
mail -s “test email” [email protected] </dev/null