Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to back up microsoft exchange server [title] Make sure the exchange system manager is installed on the backup server. [title] Left-click on the start key and choose " run. [step] " type in " ntbackup " on the command line.

Ending1: It is a blue button with a white hourglass on it. You will be prompted to enter your ntrestore id password again. Ending2: [title] Type " user name " in the search box. [step] " online exchange server " followed by a " user name " box. Ending3: When the prompt comes in, right-click on it and select " run. " [title] Enter the key that you entered for the backup system manager. Ending4: [title] Click on the prompts to the next screen. [step] Choose a folder to save the backed up files to.

Answer format: ending1/ending2/ending3/ending4