You better sell them the idea that this service will go down from time to time and they should have an emergency hobby for those brief moments..
Would greatly improve their mental health and reduce stress levels as commonly seen in Shoutbox channel :)
The line you normally get from your panel, for each and every user, with download.
In that line you have to manually replace whatever dns you picked with http://clientportal.link:8080/
I wouldn't bother, but if you feel bored, go ahead.
Normal line will probably work before you get done..
All...
Normal.. Well, if you think this will never happen again, then you're out of luck.
But I wouldn't call it normal. But it happens.
And you can do absolutely nothing about it.
Writing in shoutbox doesn't help, asking a thousand times doesn't help.
Everyone learns this over time...
Patience, watch...