Outlook 2013/Exchange 2013 shared calendar issues

We started moving mailboxes to Exchange 2013 and deploying Office 2013 around the same time and Office 2013 users are having issues editing their own entries in the shared calendars:

We have users experiencing issues with shared Calendars in Outlook.  Unless they are the owner of the calendar they are not able to edit, add or delete any information on the calendar.  This includes information that they placed there prior to the exchange upgrade.  Most are set as “Author” on the calendars and should be able to edit their own information but they are not allowed.  I have had the owners remove and readded the users and reset their permissions with no success.
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Jian An LimSolutions ArchitectCommented:
assume i paint the picture more clearer and explain what happen.

you have mailbox A,B,C have author access to Mailbox S on premises

you move the mailbox A B C and S to office 365.

Mailbox A cannot modify information that previously in mailbox S

the main reason it breaks is that the access was given to to the user SSID in ON-premises is difference then the one in Cloud 365.
All previous item have a author of On-premise A, not the cloud-A

AS you said, if they need to modify it, it is equal to delete and readd.
New item that they created using the author right will work accordingly, just not the previous item.
nourbenAuthor Commented:
IT turned out to be a load balancer issue

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
nourbenAuthor Commented:
I've requested that this question be deleted for the following reason:

Not an Exchange/Outlook issue, it was the load balancer
Jian An LimSolutions ArchitectCommented:
i would recommend to accept your answer as that is right answer instead of deleting it.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.