Sometimes it is useful to set the maximum number of issues that can be exported/imported.
You can also do it in ImpEx Cloud:
Log in as a user with the Site administrator (https://confluence.atlassian.com/cloudkb/adding-new-products-or-add-ons-to-existing-atlassian-cloud-instance-710837189.html).
Click the Apps drop-down and choose Manager your apps.
- Find ImpEx in a list of your installed apps and expand it with the little arrow icon before the add-on's name.
- Choose the Configure button.
After selecting it, you can set the maximum number of issues that can be exported/imported here:
(If you set 0, you can export maximum 1 million issues.)