Onetime URL temporarily provides authentication-free access to specific files. You specify its effective period and allowed download count when publishing Onetime URL. Onetime URL becomes invalid when the effective periods expire, or the download counts exceed the limit.

Uploading a file to the folder with “Publish Onetime URL” enabled will automatically publish the file’s Onetime URL. See “Action Setting” for more information on how to set the “Publish Onetime URL” action to folders.
You can also temporarily set “Publish Onetime URL” action at the time of file upload. See “Set Actions when Uploading Files” for more details.
You can publish Onetime URL for the uploaded files. See “Publish Onetime URL” or “Execute Actions” for more details.
Publishing Onetime URL requires “Publish Onetime URL” role.

There is no limit to the number of Onetime URLs you can publish.

No.
Publishing Onetime URL requires “Publish Onetime URL” role set on the group where the account exists.

Yes.

You can view access logs of Onetime URL from “Manage Onetime URL” on the “Management/View” menu.
“Manage Onetime URL” role lets you view the access logs of everyone’s Onetime URL. “Publish Onetime URL” role only lets you view the access logs of the URL you published.

You can stop publication of Onetime URL from “Manage Onetime URL” on the “Management/View” menu. Stopping publication makes the URL invalid. “Manage Onetime URL” role lets you stop publication of everyone’s Onetime URL. “Publish Onetime URL” role only lets you stop the publication of the URL you published.

No.
Onetime URL becomes invalid when the effective period expires, or the download count exceeds the allowed maximum. Stopping the publication also makes the URL invalid. You are not allowed to re-enable invalid Onetime URL. You will need to re-publish Onetime URL.

Premature or aborted download still counts toward the number of download. Judging the proper download from server-side is difficult. It may be advisable to set the download count higher than the actual requirement.
Also some software tool makes the use of “split download.” Split download will split a single download to multiple sessions, thus counting as multiple downloads.

Clicking a URL in the message may cause error with Outlook Express. Please manually paste the URL into the address bar portion of your Web browser.

IIJ has confirmed that Safari on Mac OS X will open the file rather than downloading. Please use another Web browser and retry. Opening a file will also count toward the number of download. It may be advisable to set the download count higher than the actual requirement.

If the .exe contains Japanese characters, the file name may become garbled depending on character string or the web browser. Please try using single-byte alphanumeric characters and retry.