I am getting the same error.  Sync with the authentication mailbox works, but when you add additional mailboxes we get the same "syncKey not found" message.  Case opened with SageCRM support.  They are looking at it.

Same here, also logged with Sage support

I'm also seeing an error with one of our clients which looks very similar to this.  Sage (UK) tech support have suggested:

Any users that wish to synchronise with exchange integration must complete the following steps in order to be successful:
1. Logout of their Microsoft Exchange account
2. Clear the browser cache by selecting ALL TIME
3. Login to Sage CRM
4. Go to | Preferences
5. Select Connect to Email Account or Switch Email Account
6. Enter the email account details when prompted and validate if required
7. Click Continue
Then once this has been completed the system administrator user can then add these users to the synchronisation by going to - Administrator – Email and Documents – Exchange Integration – Connection Management – User Mailbox Management. From here, anyone that has complete the steps above can be added.
You will then need to go to - Administrator – Email and Documents – Exchange Integration – Synchronisation Management and you can enable to the synchronisation with the required settings.

Previously the Exchange sync was purely server side and did not involve any end user interaction, which was a far better way to manage this.  With the removal of ApplicationImpersonation I'm assuming that this is no longer possible, but if were possible to go back to not having to rely on users configuring their Email Account in their preferences this would be a far better solution. 

I'm also seeing an error with one of our clients which looks very similar to this.  Sage (UK) tech support have suggested:

Any users that wish to synchronise with exchange integration must complete the following steps in order to be successful:
1. Logout of their Microsoft Exchange account
2. Clear the browser cache by selecting ALL TIME
3. Login to Sage CRM
4. Go to | Preferences
5. Select Connect to Email Account or Switch Email Account
6. Enter the email account details when prompted and validate if required
7. Click Continue
Then once this has been completed the system administrator user can then add these users to the synchronisation by going to - Administrator – Email and Documents – Exchange Integration – Connection Management – User Mailbox Management. From here, anyone that has complete the steps above can be added.
You will then need to go to - Administrator – Email and Documents – Exchange Integration – Synchronisation Management and you can enable to the synchronisation with the required settings.

Previously the Exchange sync was purely server side and did not involve any end user interaction, which was a far better way to manage this.  With the removal of ApplicationImpersonation I'm assuming that this is no longer possible, but if were possible to go back to not having to rely on users configuring their Email Account in their preferences this would be a far better solution. 

We're still waiting on Sage to confirm they have fixed a bug where it is synchronising everything but is an hour out. (in some cases one user might be OK but another is an hour different and they're both set up with the same time zone)

And yes I hate that we have to remote users to the server in order to log them in and for them to set up their mailboxes. First time I'm glad our entire company doesn't use the diary as that would be 150 users otherwise

Hi Matthew, same issue here, some appointment are ending before starting  

The issue of the appointments being an hour out is something I have raised with Sage (UK) tech support and got the following response

This is something that is currently under investigation as this has been raised on most sites that we have. I will update you once we have a resolutions for this.

The Sage CRM 2024 R2.1 patch was released before the clocks changed here in the UK, which I am guessing is the issue.  When I tested the patch in my test environment in March (before the clocks changed) this issue was not occurring.

The documentation indicates that there is no separate option for daylight saving.

https://help.sagecrm.com/on_premise/en/2024R2/Administration/Content/Administrator/SS_SysBehaviorSets.htm

Thank you Alisona. It's just "amazing" ...

This is something that is currently under investigation as this has been raised on most sites that we have. I will update you once we have a resolutions for this.

If someone working at Sage is reading us, I love this CRM, but guys, Microsoft annouced the end of impersonation in 2024, you developped a patch in 2025 and this patch doesn't work "on most site that you have" , really ?!

What can I tell to my customers ? Please try to be a bit more reactive and clear in explanation 

Have you tested mail merge? The patch broke this facility for us (we were in version 2023R1) and we are losing £££ as my customers rely on this for daily quoting. Still waiting for a resolution.

Regarding the mail merge issue this is not something I can replicate in my test environment and none of the clients which I've upgraded have reported this issue.

Did you upgrade directly from Sage CRM 2023 R1 to Sage CRM 2024 R2.1?  The following article suggests that that best practice is to upgrade to Sage CRM 2024 R1 first.

communityhub.sage.com/.../sage-crm-2024-r2-planning-your-upgrade-changes-in-supported-software

With all of the systems I have applied this 'patch' to (which have not already been running Sage CRM 2024 R2) I have upgraded to Sage CRM 2024 R2 then applied Sage CRM 2024 R2.1.

Yes, I upgraded directly from 2023R1 to 2024 R2.4. The readme file suggested this would be OK. Sage are aware of this and have a case to look at the problem, but nothing yet. Thanks for the info though.

I've been advised by Sage (UK) tech support that another patch is on its way to address the time difference when appointments are synchronised.  

Correct patch is on its way 

Hi all, patch on its way .. all my customers are impacted now, I don't know what I should answer please Sage, make it quick quick quick... Are we sure that Dublin still have developers ??  Mine is alone and can fix his dev in the day ! Can't believe it make so much time with a company like Sage !

Hi Stanislas

We very much have a development team here in Dublin and we are vey much aware of the impact the delay is having on customers.  We are using all our efforts to address the issues and patches for all supported versions of Sage CRM will be released as soon as possible.  Thank you for your continued patience.

Hi, thanx for replying

All my customers are asking me "When". I need to give them a delay. This thread is opened since 1 month now .. My patience doesn't really matter, but their yes. I don't want to loose my CRM customers for this kind of issue...

I understand.  If you would like me to speak with your customers I can make myself available.  And then they can hear directly from the development.

Hello

I assume there is no fix yet? Sage support are now ignoring my pleas but unfortunately our directors aren't.

Bea 

Hi Bea - We have released all the patches internally.  The 2022 & 2023 Patches were released yesterday with the 2024 patch on Friday.  We plan to announce publicly today.    

Thank you