Opening an OLAP model or metaoutline in exclusive access mode eliminates the risk of other users overwriting your changes. When you open an OLAP model in exclusive access mode, Integration Services gives you a write lock on that OLAP model that remains in effect until you close the model. When you open a metaoutline in exclusive access mode, Integration Services gives you a write lock on that metaoutline and a read lock on the OLAP model on which the metaoutline is based that remains in effect until you close the metaoutline. While you have an OLAP model or metaoutline open in exclusive access mode, other users can open and view the documents, but they cannot save them.