Microsoft 365 + ColdSend
Connect Microsoft 365 and Outlook mailboxes to ColdSend. Send cold emails through your own Microsoft Entra OAuth app or ColdSend's shared infrastructure with native reply tracking.
How it works
Add Microsoft 365 as a sender account
In ColdSend, go to Sender Accounts and choose Microsoft 365. This tells the platform you want to send from Outlook addresses.
Authorize via OAuth
Pick ColdSend's shared Microsoft app for instant setup, or connect your private Microsoft Entra app if your security team requires it.
Launch your campaign
Select your connected Microsoft 365 inboxes, upload leads, set your schedule, and start sending. Replies and bounces sync automatically.
Need detailed setup steps?
The Connect Outlook via ColdSend Shared OAuth guide covers one-click setup. If your security team requires a private Entra app, use the Outlook Private OAuth Setup Guide; for bulk-importing an entire Microsoft 365 organization, see the Outlook Organization Admin Consent Setup Guide.
Why connect Microsoft 365 to ColdSend?
Most B2B teams run on Microsoft 365. Instead of buying standalone mailboxes or setting up Azure first, you can plug your Outlook accounts directly into ColdSend's sequencer and deliverability stack. You keep the inboxes you own; ColdSend handles the sending logic, reply tracking, and deliverability monitoring.
It's especially useful if your company standardizes on Outlook, your prospects expect to see Microsoft-owned addresses, or you want to diversify sending alongside Google Workspace accounts.
What you get
Use the Outlook and Microsoft 365 accounts your team already has. No need to buy new inboxes or migrate data.
Connect through ColdSend's shared Microsoft app in one click, or bring your own Microsoft Entra app for full control over credentials and permissions.
Replies land in ColdSend's unified inbox. You see interested leads, unsubscribe requests, and bounces in one place.
Microsoft 365 accounts count toward your plan's sender limit with no extra per-inbox charge from ColdSend.
Ready to connect?
Start sending from Microsoft 365 in minutes, or open the setup guide if you need help with credentials or OAuth.
Need help? Book a call with our team.
Related integrations
Google Workspace
Connect Google Workspace mailboxes to ColdSend. Send cold emails through your own OAuth app or ColdSend's shared infrastructure with native reply tracking.
SMTP / IMAP
Connect any SMTP or IMAP inbox to ColdSend. Use ColdSend's sequencer and reply tracking with mailboxes from any provider or host.
without the infra.
