MANY Outlook Calendar Reponses To Google Calendar Invites EVEN when i've accepted

Question

MANY Outlook Calendar Reponses To Google Calendar Invites EVEN when i've accepted

Mark Sutter 35

HI there - been to 5 local IT professionals! Last one said the reason my customers or acquitances are getting literally over a dozen calendar responses ( like double digits...declines, tentantives, accepted) unbeknownst to me is that there's an issue in server communication between MSFT and Google.
We tested me receiving various google calendar invites both via the APP or via Online browser settings and each I case i accept and on their end they get 10-20+ responses that i've declined, accepted tentatively etc. All looks fine on my end. Last IT guy said I had to escalate this to MSFT first then maybe Google as it says they cannot fix it and it's not a local software issue on my end. Please help...people are getting vary annoyed and I'd rather not move off MSFT because of this.

Bismarck Gonzalez 0 Reputation points

2024-12-06T20:55:27.1766667+00:00

Based on what you've described, it does seem like there might be an issue with server communication between Microsoft and Google.
Mark Sutter 35 Reputation points

2024-12-13T01:50:33.4933333+00:00

HI -sorry I was busy. Not fixed yet. Anybody using Google sending me new meeting invites - just one invite 2 days ago from a new contact and today they told me they go like 20 notifications. So, any new meetings using Google on their back end is still causing them major havoc.

As previously tested...it doesn't' appear to atter if using the OWA or otherwise.

If you have a google account and want to experience this I'm happy to provide my work email.

THank you!!
Mark Sutter 35 Reputation points

2024-12-13T01:58:02.3533333+00:00

I'll add - If I send them an invite...not issues. It's only an issue (a big issue!) if the invite originates from their/any Google account...even via Calendy etc..
Anonymous

2025-01-02T08:22:48.9533333+00:00

Hi @Mark Sutter

If the answer is helpful, please click on ACCEPT ANSWER as it could help other members of the Microsoft Q&A community who have similar questions and are looking for solutions. Warm thanks!
Jesse 10 Reputation points

2025-01-09T20:19:34.75+00:00

Hi Mark,

Have you found the solution to this yet? We are having the same exact issue and have tried trouble shooting with GoDaddy and everyone is stumped.

It would be great to get the solve to this.
Mark Duckworth 10 Reputation points

2025-01-24T16:30:51.7433333+00:00

This happens to me constantly with my work O365 account, and has for a couple of years. All of my suppliers who use GSuite for their business mail and calendar get a barage of changing replies (accept, decline, tentative) when they invite me to meetings.

At this point if they invite me I copy the meeting info into my own calendar invite and then they can remove me from their invite so that they don't get flooded.
Tiffany Castagno 5 Reputation points

2025-02-08T03:29:08.24+00:00

This has been happening to me now too since mid-to-end of November. It's a huge problem and has become disruptive to my business and to my clients and Community. It's too much and I can't fine a way despite whom I consult. I can't believe I'm seeing all these comments and posts of it happening to others. I'm sorry we all have to deal with this.
Frank Watson 5 Reputation points

2025-02-21T00:05:05.5+00:00

I'll provide additional details. The issue is occurring with multiple companies we do business with that use Google Mail for Business. When someone at these companies receives a meeting decline, the email header indicates that the message did not originate from our O365 environment.

Upon investigating on our end, the only meeting-related email we see is the "acceptance" sent to the Google Mail server. None of the decline notifications originate from our Microsoft tenant or any Microsoft server. This suggests that the issue lies somewhere between Google and Microsoft.

Notably, Google Mail users receive the meeting acceptance as expected but then, at random, receive declines.
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Frank Watson 5 Reputation points

2025-02-21T00:54:48.3633333+00:00

I should also note- only the "acceptance" of the meeting invite shows up in the "sent items" of the O365 user. The declines are not there.
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KLP 0 Reputation points

2025-03-21T20:32:43.1366667+00:00

Any solutions yet - I am in the same boat, and the only thing I have found is that when looking at the Google side of the problem, it is trying to resolve my MS Calendar to a Google calendar that does not exist - for that email address. This is a big issue that the two companies need to fix.
Yoni Liani 0 Reputation points

2025-04-21T19:22:17.5133333+00:00

@Frank Watson the probelm appears to be primarily when using Google Meets
Margaret 0 Reputation points

2025-04-23T15:01:30.73+00:00

Does anyone know if this issue has been solved yet? I have clients are getting numerous responses from that I didn't send.
Path 0 Reputation points

2025-07-26T16:25:56.21+00:00

anyone know if this has been solved or if there has been a solution. It only happens to me when I accept using Outlook/Teams and the sender is using Google Meet. Everything else works fine. I need a solution to this as I have clients canceling or missing meetings because they think I can't make it based on 15 random responses the system is generating
Tiffany Castagno 5 Reputation points

2025-07-31T22:17:19.0066667+00:00

@path We ended up de-activating my Advanced e-mail Security. I don't know if you have that or if that could be a resolution for you, but that did the trick on this side!

3 answers

Your answer

Bismarck Gonzalez 0 Reputation points

2024-12-06T20:55:27.1766667+00:00

Based on what you've described, it does seem like there might be an issue with server communication between Microsoft and Google.
Mark Sutter 35 Reputation points

2024-12-13T01:50:33.4933333+00:00

HI -sorry I was busy. Not fixed yet. Anybody using Google sending me new meeting invites - just one invite 2 days ago from a new contact and today they told me they go like 20 notifications. So, any new meetings using Google on their back end is still causing them major havoc.

As previously tested...it doesn't' appear to atter if using the OWA or otherwise.

If you have a google account and want to experience this I'm happy to provide my work email.

THank you!!
Mark Sutter 35 Reputation points

2024-12-13T01:58:02.3533333+00:00

I'll add - If I send them an invite...not issues. It's only an issue (a big issue!) if the invite originates from their/any Google account...even via Calendy etc..
Anonymous

2025-01-02T08:22:48.9533333+00:00

Hi @Mark Sutter

If the answer is helpful, please click on ACCEPT ANSWER as it could help other members of the Microsoft Q&A community who have similar questions and are looking for solutions. Warm thanks!
Jesse 10 Reputation points

2025-01-09T20:19:34.75+00:00

Hi Mark,

Have you found the solution to this yet? We are having the same exact issue and have tried trouble shooting with GoDaddy and everyone is stumped.

It would be great to get the solve to this.
Mark Duckworth 10 Reputation points

2025-01-24T16:30:51.7433333+00:00

This happens to me constantly with my work O365 account, and has for a couple of years. All of my suppliers who use GSuite for their business mail and calendar get a barage of changing replies (accept, decline, tentative) when they invite me to meetings.

At this point if they invite me I copy the meeting info into my own calendar invite and then they can remove me from their invite so that they don't get flooded.
Tiffany Castagno 5 Reputation points

2025-02-08T03:29:08.24+00:00

This has been happening to me now too since mid-to-end of November. It's a huge problem and has become disruptive to my business and to my clients and Community. It's too much and I can't fine a way despite whom I consult. I can't believe I'm seeing all these comments and posts of it happening to others. I'm sorry we all have to deal with this.
Frank Watson 5 Reputation points

2025-02-21T00:05:05.5+00:00

I'll provide additional details. The issue is occurring with multiple companies we do business with that use Google Mail for Business. When someone at these companies receives a meeting decline, the email header indicates that the message did not originate from our O365 environment.

Upon investigating on our end, the only meeting-related email we see is the "acceptance" sent to the Google Mail server. None of the decline notifications originate from our Microsoft tenant or any Microsoft server. This suggests that the issue lies somewhere between Google and Microsoft.

Notably, Google Mail users receive the meeting acceptance as expected but then, at random, receive declines.
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.
Frank Watson 5 Reputation points

2025-02-21T00:54:48.3633333+00:00

I should also note- only the "acceptance" of the meeting invite shows up in the "sent items" of the O365 user. The declines are not there.
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.
KLP 0 Reputation points

2025-03-21T20:32:43.1366667+00:00

Any solutions yet - I am in the same boat, and the only thing I have found is that when looking at the Google side of the problem, it is trying to resolve my MS Calendar to a Google calendar that does not exist - for that email address. This is a big issue that the two companies need to fix.
Yoni Liani 0 Reputation points

2025-04-21T19:22:17.5133333+00:00

@Frank Watson the probelm appears to be primarily when using Google Meets
Margaret 0 Reputation points

2025-04-23T15:01:30.73+00:00

Does anyone know if this issue has been solved yet? I have clients are getting numerous responses from that I didn't send.
Path 0 Reputation points

2025-07-26T16:25:56.21+00:00

anyone know if this has been solved or if there has been a solution. It only happens to me when I accept using Outlook/Teams and the sender is using Google Meet. Everything else works fine. I need a solution to this as I have clients canceling or missing meetings because they think I can't make it based on 15 random responses the system is generating
Tiffany Castagno 5 Reputation points

2025-07-31T22:17:19.0066667+00:00

@path We ended up de-activating my Advanced e-mail Security. I don't know if you have that or if that could be a resolution for you, but that did the trick on this side!

Answer 1

Bismarck Gonzalez 0

I would double-check the sync settings between the Microsoft account and Google Calendar to ensure they are configured correctly. In case of any cached data causing issues, I would also clear all browser's cache and cookies, and ensure all related applications (Outlook, Google Calendar) are updated to the latest versions.

Good luck!

Mark Sutter 35 Reputation points

2024-12-09T16:17:46.65+00:00

Thanks. The IT folks checked all the settings.....unfortunately this is still a massive problem. Any experts out there who can help? Thanks!
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.

Answer 2

Anonymous

Hi @Mark Sutter

Welcome to our forum!

What is your account? Outlook.com or gmail.com or something else?

Did the issue occur on Outlook desktop client?

Did you send to all Gmail accounts, they receive a lot of replies emails, or individual accounts?

Based on my research, i did the following steps and everything works fine.

Outlook.com account (signed in on Outlook client) sent a meeting to Gmail, Gmail could accept normally.
Gmail account sent a meeting to outlook.com (on Outlook client), after replying on Outlook client, Gmail receives only one reply message to receive the invitation.
Gmail A account (signed in on Outlook client) sent a meeting to Gmail B (signed in on web), B account could receive normally.
Gmail B account (on web) sent a meeting to Gamil A (on Outlook client)，after A replies, Gmail B receives only one reply saying that A accepted the invitation.

Everything seems to be running smoothly, to further confirm if the issue is more related to Outlook desktop client, you may try updating the client or re-adding your account to see if the problem is repeated, if not, it may be more related to users who use Gmail accounts, and it is recommended that they clear their browser cache or update the app to see if the problem persists.

Hope it helps.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our [documentation] to enable e-mail notifications if you want to receive the related email notification for this thread.

Mark Sutter 35 Reputation points

2024-12-09T16:20:38.25+00:00

Thanks - it happens either way desktop client or using the outlook app. Yes, they are getting like 20 notifications of the meeting invite they sent. I'm up to date on latest updates. Help!
Anonymous

2024-12-11T02:55:37.2233333+00:00

Hi @Mark Sutter

Thanks for your response.

Please ensure disable Automatic Processing: In Outlook, go to File > Options > Mail > Tracking and uncheck "Automatically process meeting requests and responses to meeting requests and polls". This can help prevent multiple notifications from being sent.

In addition, i find a similar thread that many people find it useful, please feel free to refer to.

Hope it helps.
Anonymous

2024-12-13T01:45:26.0733333+00:00

Hi @Mark Sutter

Just checking in to see if above information was helpful. If it is useful, would you mind marking the helpful post as an answer? Which would benefit others who also has similar issues in forum. Warm thanks！
Anonymous

2024-12-13T05:49:13.1566667+00:00

Hi @Mark Sutter

Thanks for your detailed case description.

What is your account? Outlook.com or gmail.com or something else?

As i tested before, everything works fine, therefore, it is not a general issue. Since you mentioned that it works fine on OWA, the problem may be more related to your client, considering data file corruption, it is proposed that you create a new profile, re-add your account to the new profile and check if the same issue still occurs.

If the problem persists, the problem may be more related to your recipient, it is recommended that the person using the Gmail account change the device and log in to the account again to see if the problem still exists.

If the problem still exists, as a workaround, you may want to consider logging in to both the client and the web version and using OWA to respond to meeting emails from Gmail account.

Hope all the best.
Yoni Liani 0 Reputation points

2025-03-26T15:14:29.9666667+00:00

@Anonymous I have the same problem and already disabled the Automatically process option, yet it still persists.

For background this is a GoDaddy/Microsfot account accepting invites from Google Calendar users

Thank you!
Frank Watson 10 Reputation points

2025-03-27T19:23:36.3+00:00

Yoni- see my comments above. We found that the MSFT Threat Policies/Safelinks was erroring when google users would send us calendar invites with ZOOM.
Jesse 10 Reputation points

2025-04-11T20:17:06.11+00:00

@Frank Watson Hi Frank! We have this happening with one of our Microsoft Office 365 users and any calendar invites from a Google account (regardless of it containing a Zoom Link or not). Would you have any insight on a potential fix on the issue outside of what you found with it relating to specifically to Zoom?
Tiffany Castagno 5 Reputation points

2025-04-11T20:23:33.59+00:00

Same here. We are isolating issues and so far nothing is working, but I'll post here if we figure it out! Sad that we all have this going on for so long! This has been occurring for us since mid-November!
Frank Watson 10 Reputation points

2025-04-11T21:21:58.72+00:00

Lucky for us we found it was the Threat policy / Safelink protection that was causing it.
Tiffany Castagno 5 Reputation points

2025-04-11T21:34:02.1033333+00:00

Good for you. Not our case. :(
Frank Watson 10 Reputation points

2025-04-11T22:00:59.6266667+00:00

Have you went into Grok or ChatGTP? I had both working this issue and posting screenshots of settings and everything. Super helpful! There are tests you can do to disable calendar availability sharing outbound to nail down the issue but it will walk you through all of that.
Tiffany Castagno 5 Reputation points

2025-04-11T22:03:24.84+00:00

Ohhhh. I haven't @Frank Watson - good call! I appreciate you so much! I'll suggest that for our next round if this one doesn't work after we let some things flush through over the weekend.
Tiffany Castagno 5 Reputation points

2025-05-02T03:33:02.42+00:00

Hi @Frank Watson - Question for you: I'm wondering since the Safe Links method worked for you, whether you were also using GoDaddy e-mail addresses running through MS365 because you were able to see the Safe Links option, while we do not. Maybe it was moved within settings somewhere since I know there has been some additional security that GoDaddy has put on. Curious because others have also stated the issue in the comments is with Microsoft 365 from GoDaddy. Thanks in advance!

Answer 3

Frank Watson 10

We were able to pinpoint our issue. The google invite with the addition of the zoom link (Chrome zoom extension) was setting off something with "Safelinks" in o365 security when it was calendar processing.

The messages were getting delivered but the calendar processing didn’t block the email delivery but interfered during calendar sync by rewriting or flagging the Zoom/Google URLs in the ICS file, causing Exchange to reject the event (Even though it still delivered to the end user) and signal a message to Google Calendar (likely via Graph or EWS since we see no SMTP traffic on this). So we think o365 could have signaled something back to google that it didn’t like in the ICS file causing google servers to send the responses. If you review the headers of the decline/accept emails the headers show they come from google servers NOT the end user environment.

To test go into O365 Admin - Go into Security Admin Center - Then click on Policies and Rules - then click on Threat Policies - then click on Safe Links. You can temporarily turn this off to test but this was what was causing the auto accept/decline invite bombardment.

Once you determine if thats it you can create some custom policies for safelinks to work better with zoom/google and turn it back on.

Frank Watson 10 Reputation points

2025-07-26T18:13:29.6733333+00:00

They changed the O365 admin console a little. So to turn off Safe-Links you go into the O365 Admin console- Then click on Security under Admin Centers- then click on Policies and Rules- then click Threat Policies. Then click Safelinks- and we turned off the "recommended safe links rule"
Tiffany Castagno 5 Reputation points

2025-07-31T22:16:13.31+00:00

Yes and we ended up deactivating my Advanced e-mail Security since that was the problem on this end. I haven't had a problem since.
Vartan Abulyan 0 Reputation points

2025-10-30T19:43:27.8066667+00:00

Disabling the O365 Safe links doesn't seem to solve the problem. Seems like it causes the same issues for some but not all. Also, i see a Built-in protection (Microsoft) as enabled in Safe links but no way to disable this. Any other recommendations? Where's the Advanced e-mail security so i can disable and test after?

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MANY Outlook Calendar Reponses To Google Calendar Invites EVEN when i've accepted

3 answers

Your answer