In this blog post, we’ll look at some of the most common challenges experienced by users undergoing a cloud migration/merge.
1.Identification

Email addresses are replacing usernames in an effort to make the identification of users more unique in cloud across multiple instances.
This is a challenge because the username is the identifier in a server instance which makes the mapping of usernames to email addresses difficult — ergo, if the email address is not unique, then the import will fail.
2.Limitations

Upgrades are a no-brainer to many, but not everyone. These individuals should be wary of the limitations involved in using older versions of software (especially if they intend on migrating said software).
For example, if your version of Jira or Confluence is outdated, the import will fail.
3.Loss of data

Just writing that header was painful, nobody likes the prospect of losing data, but the fact of the matter is it happens. Why? If for instance, you are dealing with an app that does not support your migration to the cloud or one that does not have a cloud implementation at all then unfortunately data will be lost.
4. Bulk migrations

At the moment, it’s not possible to migrate Jira projects one at a time, therefore the whole site has to be migrated. This means that you have to delete projects you don’t want in the cloud once they are in there. Alternatively, you can delete them before migrating.
Note: If it’s a merge of cloud and server, there are more difficulties.
5. Finding the right cloud

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