Connection to subfolder of the inbox of a shared mailbox - excel

Question

On my laptop it works, however for the team the code works only sometimes. They get below error message.
It is supposed to connect to a specific Outlook folder.
When I reduce code to
Set Folder = Ns.GetSharedDefaultFolder(olShareName, olFolderInbox) '// works fine
then there is no issue on their side, however when variable is extended to specific folder it works 1 out of 10 times.
References are set in Excel, folders names are correct because it works on my laptop.
in line
`
Sub macro()
'declare variable
Dim olApp As Outlook.Application
Dim Ns As Outlook.Namespace
Dim Folder As Outlook.MAPIFolder
Dim olShareName As Outlook.Recipient
Dim olMailItem As Outlook.MailItem
'clear objects
Set olApp = Nothing
Set Ns = Nothing
Set olShareName = Nothing
'set outlook variable
Set olApp = New Outlook.Application
Set Ns = olApp.GetNamespace("MAPI")
Set olShareName = Ns.CreateRecipient("xxx#xx.com") /// Owner's email address
Set Folder = Ns.GetSharedDefaultFolder(olShareName, olFolderInbox).Folders("SHAREPOINT COO").Folders("COO") '// doesn't work
'Set Folder = Ns.GetSharedDefaultFolder(olShareName, olFolderInbox) '// works fine
Set Items = Folder.Items
end sub

Answer 1

The error means the folder does not exist. Keep in mind that Namespace.Folders returns the top level folders of all stores in the profile. Unless you have a mailbox (not a folder) named "Inbox", that line will fail.
If you want the Inbox folder, use Namespace.GetDEfaultFolder(olFolderInbox) instead.

Answer 2

Use the Recipient.Resolve method which attempts to resolve a Recipient object against the Address Book before calling the NameSpace.GetSharedDefaultFolder method.
Set olShareName = Ns.CreateRecipient("xxx#xx.com") /// Owner's email address
olShareName.Resolve
Set Folder = Ns.GetSharedDefaultFolder(olShareName, olFolderInbox)
Also I'd recommend breaking the chain of property or method calls by declaring each property or method call on a separate line of code. Thus, you will be able to find out which property or method fails.