SiteUsers.GetByEmail() returns user not found error

Question

I have a custom webpart in which I get the SPUser object from email address, see the code below. It was working fine for like an year now , but since yesterday it gives a

"User cannot be found"

error. There was no change made in the code or anywhere else. And I checked in the User Information List whether those email addresses exists and they do. I do understand what is causing this error. Any suggestion on were to look is appreciated.

Here is the line that's causing problem now:

spUser = spWeb.SiteUsers.GetByEmail(txtEmail.Text);

Update

I also tried checking through powershell by the following method. In this case I am getting some of the users correctly. but for some other users email addresses I tried, it returns the same

"user cannot be found" exception.

$user = $web.Users.GetByEmail("[email protected]")

Answer 1

One option may be to replace spWeb.SiteUsers.GetByEmail with spWeb.EnsureUser.

Even though the documentation indicates that EnsureUser accepts a user's domain\username as a parameter, in practice I've found that an email address works as well, although this may be dependent on your environment's configuration.

Answer 2

kindly try below.

spUser = spWeb.AllUsers.GetByEmail(txtEmail.Text);