OpenAI + Microsoft Exchange via Zapier – Draft Emails Not Consistently Saving

Hello everyone,

I’m running into an issue with my Zapier automation involving Microsoft Outlook (Exchange), OpenAI API, and email drafting.

My Setup:

1️⃣ Trigger: When a new email arrives in Microsoft Outlook (Exchange)

2️⃣ Action: Send the email body to OpenAI (ChatGPT via API) for summarization and response generation

3️⃣ Action: Save the AI-generated response as a draft email in Microsoft Outlook

Problem:

• Zapier successfully triggers and sends data to OpenAI, and I can see the logs confirming the response.

• However, the generated draft email does not always appear in my Outlook Drafts folder—sometimes it works, sometimes it doesn’t.

• There are no error messages in Zapier, making it hard to pinpoint what’s failing.

What I’ve Tried So Far:

✅ Verified API & Billing – OpenAI API is active, and I have usage credits available.

✅ Checked Exchange Permissions – Admin consent is granted for Mail.ReadWrite, Mail.Send, and User.Read.

✅ Tested Manual Draft Creation – If I manually create a draft via Exchange, it works.

✅ Zapier Logs Show Success – But the drafts are still missing sometimes.

Questions for the Community:

1️⃣ Is there a known issue with Zapier’s Microsoft Exchange integration when saving drafts?

2️⃣ Are there additional Exchange settings I need to configure to allow Zapier to create drafts reliably?

3️⃣ Could OpenAI’s token limits or API response size be causing an issue with Zapier?

4️⃣ Has anyone successfully implemented a similar workflow? If so, any troubleshooting tips?

I appreciate any help or insights!

Thanks