(VBA) Outlook *sometimes* not sending bulk email (anyone else have this issue?)

[Sleeplol]

Hello,
I've built a Pass-On report that is stored on the company's shared drive (P:\OPERATIONS\Shift Handover).
It is used by 4 Sr Operators who use a "Shortcut" of the WB saved on each of their desktops.
At end of shift they enter data into their Shortcut WB and select a button that runs 3 macros:
1- Save entered data to the bottom row of "DATABASE" sheet
2- Open Outlook, add all TO emails, & paste in copy of a selected range into body (this is the "Form" they fill out, which is just designated cells)
3- Print "Form"

Macro 1 & 3 work 100% of the time
Macro 2 works like 70% of the time across all 4 users.

Notes:
1- I've spoke with all 4 and they NEVER get an error
2- Sometime days multiple emails for different **** dates will be received. This is odd because I've set the application up so that a user can NOT send past shift dates.
It's as if these emails are stuck in that user's Outlook send query and either don't send or waits till the user logs back in and then *BAM* all the emails in the Q get sent.
3- There are currently 10 TO emails; maybe it is getting hung up on that.

Could this be an issue with Outlook??? If so, how would I go about fixing this?

Also, normally I'd post all of the script, but since it's not returning an error and works most of the time, I don't think it's necessary.

Thanks for any advice

 

[splion]

Did you find a solution? I have a similar experience. One user in particular has a problem in his profile that IT cannot identify and they refuse to do anything significant in terms of a reset.

It seems to work better when the Excel user is signed into Outlook on the desktop vs a browser version.