You can post invoice batches individually from the A/R Invoice Batch List screen.
For more information on posting see About Posting Batches.
To post an invoice batch:
Accounts Receivable > A/R Transactions > Invoice Batch List.
Select the batch you want to post in the list, and then click Post.
If the Ready To Post option is not selected for the batch, a message appears that lets you select the option and post the batch.