Run Microsoft 365 “Send Email” from Slack “New Message in Channel”
TriggerSlack · New Message in Channel
ActionMicrosoft 365 · Send Email
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Connect Slack and Microsoft 365
Choose either direction, select popular real Trigger and Action definitions, and open a preconfigured Workflow draft.
Build this Workflow
Your selected Trigger and Action are carried into FastHook. Connect accounts, review field mapping, and activate only when the draft is ready.
Popular Workflows
Start with a ready-made template
Each template fixes a useful starting Trigger and Action. You can change both operations inside the Workflow draft.
Use this template
Run Slack “Send Message” from Microsoft 365 “New Outlook Email”
TriggerMicrosoft 365 · New Outlook Email
ActionSlack · Send Message
Connect Slack “New Direct Message” to Microsoft 365 “Create Draft”
TriggerSlack · New Direct Message
ActionMicrosoft 365 · Create Draft
Two-way automation
What you can automate between Slack and Microsoft 365
The public builder uses popular operations as a focused starting point. The technical references contain all 56 Triggers and 32 Actions available across this pair.
Slack → Microsoft 365
New Message in Channel to Send Email
Use Slack “New Message in Channel” as the Trigger, then map its output into Microsoft 365 “Send Email”.
Microsoft 365 → Slack
New Outlook Email to Send Message
Use Microsoft 365 “New Outlook Email” as the Trigger, then map its output into Slack “Send Message”.
Slack
41 Triggers · 17 Actions
Start Workflows from Slack events and automate messages, reactions, channels, pins, and member operations.
Microsoft 365
15 Triggers · 15 Actions
Automate Outlook, Calendar, Contacts, Excel, Teams, OneDrive, and custom Microsoft Graph operations.
Choose the direction
Start in either app and change direction without leaving the public integration page.
Select the events
Use focused popular operations here; the complete provider catalogs remain in the technical documentation.
Review the draft
Connect accounts, confirm resources and schema-aware mapping, then activate explicitly.
Slack + Microsoft 365 FAQ
Can Slack trigger actions in Microsoft 365?
Yes. Choose one of the popular Slack Triggers on this page and pair it with a Microsoft 365 Action. FastHook creates a draft so you can connect accounts and review mapping before activation.
Can Microsoft 365 trigger actions in Slack?
Yes. Switch the direction in the builder, then select a Microsoft 365 Trigger and a Slack Action.
Can I change the Trigger or Action later?
Yes. The public builder sets the starting values. You can change the operation, account, resource, and field mapping inside the FastHook Workflow before activation.
How are fields mapped between the apps?
FastHook uses the Trigger output schema and Action input schema to propose compatible fields. Review ambiguous or provider-specific values in the draft before the first run.