Hi,
Since you have said "Business Premium and few having E5 license" , I guess you are working on SharePoint Online. Even if it is SharePoint Online or SharePoint Server, 5000 is a thresh hold limit set by design . You will get the below error if you
try to upload new document beyond the count of 5000.
"Sorry Something went wrong : Number of items in the list exceeds list view threshold which is 5000 items"

List
exceeds the list view threshold
You can create multiple views with less than 5000 items to over come this issue. For more information on the workaround check
here
Regards,
Priyan
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